Mapping Mountains - Significant Name Changes - 30-99m Twmpau

30-99m Twmpau – Significant Name Changes

The 30-99m Twmpau (thirty welsh metre prominences and upward) are the Welsh hills at or above 30m and below 100m in height that have a minimum drop of 30m.  Accompanying the main P30 list is a sub list entitled the 30-99m Sub-Twmpau with the qualification to this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop.

The list is authored by Myrddyn Phillips and the posts that have appeared on Mapping Mountains detailing the significant name changes to the main P30 list and the sub list appear below presented chronologically in receding order.

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Arw Fawr (SH 314 816) - 70th significant name change

Hill Reclassifications post for Arw Fawr

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Arw Fawr (SH 314 816)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward.

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its west and the A5025 road to its immediate east, and has the village of Llanfachreth towards the north. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 30m) notation with 22m of drop, based on the 30m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 8m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 38 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Arw Fawr in the apportionments, with the details on the Tithe map appearing in the parish of Llanynghenedl and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Arw Fawr, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Arw Fawr

Previously Listed Name:  Pt. 30m 

OS 1:50,000 map:  114

Summit Height:  30.9m (LIDAR) 

Summit Grid Reference:  SH 31485 81608 (LIDAR) 

Bwlch Height:  7.8m (LIDAR) 

Bwlch Grid Reference:  SH 31747 81483 (LIDAR) 

Drop:  23.15m (LIDAR) 

 

Myrddyn Phillips (August 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Tyn Llan (SH 327 820) - 69th significant name change

Hill Reclassifications post for Tyn Llan

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Tyn Llan (SH 327 820)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast and the A5025 road to its west, the B5109 road to its south and minor roads to its north and east, and has the village of Llanfachreth towards the west north-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. c 38m) notation with an estimated c 21m of drop, based on an estimated c 38m summit height and the 17m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 6 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Tyn Llan in the apportionments, with the details on the Tithe map appearing in the parish of Llanllibio and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Tyn Llan, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tyn Llan

Previously Listed Name:  Pt. c 38m 

OS 1:50,000 map:  114

Summit Height:  38.5m (LIDAR) 

Summit Grid Reference:  SH 32709 82087 (LIDAR) 

Bwlch Height:  8.6m (LIDAR) 

Bwlch Grid Reference:  SH 33264 82316 (LIDAR) 

Drop:  29.9m (LIDAR) 

 

Myrddyn Phillips (August 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Pen y Graig Wen (SH 446 879) - 68th significant name change

Hill Reclassifications post for Pen y Graig Wen

Significant Height Revisions post for Pen y Graig Wen

Summit Relocations post for Pen y Graig Wen

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Pen y Graig Wen (SH 446 879)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its east, minor roads to its north, south and east and the B5111 road to its west, and has the village of Rhos-y-bol towards the west north-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. c 92m) notation with an estimated c 24m of drop, based on an estimated c 92m summit height and an estimated c 68m bwlch height, with both heights based on interpolation of 5m contouring that appears on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 36 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Pen y Graig Wen in the apportionments, with the details on the Tithe map appearing in the parish of Llandyfrydog and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Pen y Graig Wen, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Pen y Graig Wen

Previously Listed Name:  Pt. c 92m 

OS 1:50,000 map:  114

Summit Height:  94.3m (LIDAR) 

Summit Grid Reference:  SH 44637 87986 (LIDAR) 

Bwlch Height:  68.2m (LIDAR) 

Bwlch Grid Reference:  SH 45162 88579 (LIDAR) 

Drop:  26.1m (LIDAR) 

 

Myrddyn Phillips (August 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Llanol (SH 380 882) / Fferam Isaf (SH 384 881) - 67th significant name change

Hill Reclassifications post for Llanol / Fferam Isaf

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is encircled by minor roads with Llyn Alaw to its south-east, and has the village of Carreglefn towards the north. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed as a twin summit with 24m of drop, based on the 98m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map at SH 38057 88231 and the 98m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map at SH 38425 88175, and the 74m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the twin summits of this hill comprise bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

Extract from the Tithe map

The enclosed land where the twin summits of this hill are situated are given the numbers 16 and 11 on the Tithe map, these can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the twin summits of this hill are situated is named as Llanol and Fferam Isaf in the apportionments, with the details on the Tithe map appearing in the parish of Llanbabo and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Llanol / Fferam Isaf, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanol / Fferam Isaf

Previously Listed Name:  Pt. 98m 

OS 1:50,000 map:  114

Summit Height:  98m (spot height)

Summit Grid Reference:  SH 38057 88231 (Llanol spot height) & SH 38425 88175 (Fferam Isaf spot height) 

Bwlch Height:  74m (spot height) 

Bwlch Grid Reference:  SH 38310 88630 (spot height) 

Drop:  24m (spot height summit and bwlch) 

 

Myrddyn Phillips (July 2021)

 

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Yr Ogof (SH 356 888) - 66th significant name change

Hill Reclassifications post for Yr Ogof

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its west, the A5025 road to its north-west and minor roads to its west, south and east, and has the village of Llanfechell towards the north north-east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 92m) notation with an estimated c 24m of drop based on the 92m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 68m bwlch height, based on interpolation of 5m contouring between 65m – 70m. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 173 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Yr Ogof in the apportionments, with the details on the Tithe map appearing in the parish of Llanfechell and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Yr Ogof, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Yr Ogof

Previously Listed Name:  Pt. 92m 

OS 1:50,000 map:  114

Summit Height:  92m (spot height) 

Summit Grid Reference:  SH 35650 8879 (spot height) 

Bwlch Height:  c 68m (interpolation) 

Bwlch Grid Reference:  SH 37450 88739 (interpolation) 

Drop:  c 24m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021) 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Pt. 88m (SH 311 869) - 65th significant name change

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the two listings that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its west, minor roads to its north and south-east and the A5025 road farther to its east, and has the village of Llanfaethlu towards the east. 

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the transposed name of Maes Maethlu, which is a prominent name that appears near the summit of this hill on the contemporary Ordnance Survey 1:25,000 Explorer map.

Maes Maethlu

85c

SH311869

114

262

 

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore, I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate, with the previously listed name of Maes Maethlu applying to a street and not necessarily to the hill itself. 

Extract from the Ordnance Survey 1:25,000 Explorer map

This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found.  However, even when research is conducted an appropriate name for the hill may not be found, and on such occasions, including for this hill the listing protocol is to use the point (Pt. 88m) notation. 

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Pt. 88m, and this is being used as the author has not found an appropriate name for the hill either through historic research and / or local enquiry. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Pt. 88m

Previously Listed Name:  Maes Maethlu 

OS 1:50,000 map:  114

Summit Height:  88m (spot height)

Summit Grid Reference:  SH 31119 86934 (hand-held GPS via DoBIH)

Bwlch Height:  52m (spot height)

Bwlch Grid Reference:  SH 32093 87850 (spot height) 

Drop:  36m (spot height summit and bwlch)

Dominance:  40.91% (spot height summit and bwlch)

 

Myrddyn Phillips (July 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Ty’nlôn (SH 326 887) - 64th significant name change

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its west, minor roads to its north-east, north-west and west, and the A5025 road to its south-east, and has the village of Rhyd-wyn towards the west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was listed under the invented and transposed name of Moel Llanrhyddlad, with an accompanying note stating; Name from the hamlet to the North-East.

Moel Llanrhyddlad

95c

SH327888

114

262

Name from the hamlet to the North-East

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a hamlet and prefix it with the word Moel.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 139 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Ty’nlôn in the apportionments, with the details on the Tithe map appearing in the parish of Llanrhuddlad and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Ty’nlôn, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Ty’nlôn

Previously Listed Name:  Moel Llanrhyddlad 

OS 1:50,000 map:  114

Summit Height:  97m (spot height) 

Summit Grid Reference:  SH 32697 88754 (spot height) 

Bwlch Height:  68m (spot height) 

Bwlch Grid Reference:  SH 32526 89419 (spot height) 

Drop:  29m (spot height summit and bwlch) 

 

Myrddyn Phillips (July 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Ynys Cynfelyn (SN 649 919) - 63rd significant name change

Significant Height Revisions post for Ynys Cynfelyn

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Ynys Cynfelyn (SN 649 919)

The criteria for the two listings that this name change applies to are:

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Pumlumon group of hills, which are situated in the north-western part of Mid and West Wales (Region B, Sub-Region B2), and it is positioned with the coast to its west, the B4353 road to its north, a minor road to its south and the A487 road to its east, and has the village of Tal-y-bont towards the south. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was listed under the transposed name of Plas y Gwynfryn, with an accompanying note stating; Name from buildings to the West.

Plas y Gwynfryn

40c

SN649919

135

23

Name from buildings to the West

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a house and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

Online research found reference to this hill is a book entitled Annals and Antiquities of the Counties and County Families of Wales by Thomas Nicholas.  The reference in this book names the hill as Ynys Cynfelyn.  An extract from this book is given below. 

Extract from the Annals and Antiquities of the Counties and County Families of Wales by Thomas Nicholas

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Ynys Cynfelyn and this was derived from the Annals and Antiquities of the Counties and County Families of Wales by Thomas Nicholas. 

 

The full details for the hill are: 

Group:  Pumlumon 

Name:  Ynys Cynfelyn

Previously Listed Name:  Plas y Gwynfryn 

OS 1:50,000 map:  135

Summit Height:  45.1m (LIDAR) 

Summit Grid Reference:  SN 64923 91967 (LIDAR) 

Bwlch Height:  5.5m (LIDAR) 

Bwlch Grid Reference:  SN 65441 92012 (LIDAR) 

Drop:  39.65m (LIDAR) 

Dominance:  87.88% (LIDAR) 

 

Myrddyn Phillips (July 2021)

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Cemaes Fawr (SH 379 928) - 62nd significant name change

Hill Reclassifications post for Cemaes Fawr

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data and LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cemaes Fawr (SH 379 928)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north-west, the A5025 road also to its north-west and minor roads to its west, south and immediate east, and has the village of Cemaes towards the north-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 56m) notation with an estimated c 22m of drop based on the 56m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map and an estimated c 34m bwlch height based on interpolation of 5m contouring between 30m – 35m. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 44 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Cemaes Fawr in the apportionments, with the details on the Tithe map appearing in the parish of Llanbadrig and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Cemaes Fawr, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cemaes Fawr

Previously Listed Name:  Pt. 56m 

OS 1:50,000 map:  114

Summit Height:  55.9m (LIDAR) 

Summit Grid Reference:  SH 37927 92898 & SH 37925 92896 & SH 37927 92896 (LIDAR) 

Bwlch Height:  c 34m (interpolation) 

Bwlch Grid Reference:  SH 38185 93111 (interpolation) 

Drop:  c 22m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Teilia (SH 381 941) - 61st significant name change

Hill Reclassifications post for Teilia

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data and mapping on the Magic Maps website. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north and west, minor roads also to its north and west and the A5025 road to its south, and has the village of Cemaes towards the south-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. c 51m) notation with an estimated c 23m of drop based on an estimated c 51m summit height and an estimated c 28m bwlch height, with both heights based on interpolation of 5m contouring that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 33 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Teilia in the apportionments, with the details on the Tithe map appearing in the parish of Llanbadrig and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Teilia, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Teilia

Previously Listed Name:  Pt. c 51m 

OS 1:50,000 map:  114

Summit Height:  51m (spot height) 

Summit Grid Reference:  SH 38125 94148 (spot height) 

Bwlch Height:  c 28m (interpolation) 

Bwlch Grid Reference:  SH 38469 94108 (interpolation) 

Drop:  c 23m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (July 2021)

 

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Pant y Gaseg (SH 414 940) - 60th significant name change

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data and mapping on the Magic Maps and WalkLakes websites. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north and the A5025 road to its south, and has the town of Amlwch towards the east south-east. 

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the transposed name of Gaerwen, with an accompanying note stating; Name from buildings to the East.

Gaerwen

70c

SH414941

114

262

Name from buildings to the East.

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a farm and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 256 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Pant y Gaseg in the apportionments, with the details on the Tithe map appearing in the parish of Amlwch and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Pant y Gaseg and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Pant y Gaseg

Previously Listed Name:  Gaerwen 

OS 1:50,000 map:  114

Summit Height:  72m (spot height)

Summit Grid Reference:  SH 41401 94065 (spot height)

Bwlch Height:  c 48m (interpolation)

Bwlch Grid Reference:  SH 41007 93863 (interpolation) 

Drop:  c 24m (spot height summit and interpolated bwlch)

 

Myrddyn Phillips (June 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Graianfryn (SH 325 839) - 59th significant name change

Hill Reclassifications post for Graianfryn

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Graianfryn (SH 325 839)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with minor roads to its north, south and east and the A5025 road to its west, and has the village of Llanfachreth towards the south-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 46m) notation with 23m of drop based on the 46m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 23m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 7 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Graianfryn in the apportionments, with the details on the Tithe map appearing in the parish of Llanfigel and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Graianfryn, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Graianfryn

Previously Listed Name:  Pt. 46m 

OS 1:50,000 map:  114

Summit Height:  45.4m (LIDAR) 

Summit Grid Reference:  SH 32558 83967 (LIDAR) 

Bwlch Height:  22.2m (LIDAR) 

Bwlch Grid Reference:  SH 33278 84232 (LIDAR) 

Drop:  23.2m (LIDAR) 

 

Myrddyn Phillips (June 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Cae Penorsedd (SH 305 834) - 58th significant name change

Hill Reclassifications post for Cae Penorsedd

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cae Penorsedd (SH 305 834)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its west, minor roads to its north and west and the A5025 road to its south-east, and has the village of Llanfachreth towards the south-east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 33m) notation with 24m of drop based on the 33m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 9m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 77 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Cae Penorsedd in the apportionments, with the details on the Tithe map appearing in the parish of Llanfwrog and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Cae Penorsedd, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cae Penorsedd

Previously Listed Name:  Pt. 33m 

OS 1:50,000 map:  114

Summit Height:  33.5m (LIDAR) 

Summit Grid Reference:  SH 30528 83481 (LIDAR) 

Bwlch Height:  9.9m (LIDAR) 

Bwlch Grid Reference:  SH 30834 83544 (LIDAR) 

Drop:  23.65m (LIDAR) 

 

Myrddyn Phillips (June 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Cae Mawr (SH 290 834) - 57th significant name change

Hill Reclassifications post for Cae Mawr

 

There has been a Significant Name Change to a hill that is listed in the Double Sub-Twmpau adjoined to the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cae Mawr (SH 290 834)

The criteria for the list that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, this height band of hills has two accompanying sub lists, the first of which is entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, and the second sub category is entitled the Double Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 20m and below 30m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and is positioned with the coast to its west and has a minor road to its north and east, and has the village of Llanfachreth towards the east south-east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 24m) notation with an estimated c 21m of drop, based on the 24m summit spot height and an estimated c 3m bwlch height, with the latter based on interpolation of 5m contouring between 0 – 5m that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 13 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Cae Mawr in the apportionments, with the details on the Tithe map appearing in the parish of Llanfwrog and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Cae Mawr, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cae Mawr

Previously Listed Name:  Pt. 24m 

OS 1:50,000 map:  114

Summit Height:  25.1m (LIDAR)

Summit Grid Reference:  SH 29051 83437 (LIDAR)

Bwlch Height:  4.2m (LIDAR)

Bwlch Grid Reference:  SH 29254 83269 (LIDAR) 

Drop:  20.9m (LIDAR)

 

Myrddyn Phillips (June 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Tyn Llan (SH 320 933) - 56th significant name change

Hill Reclassifications post for Tyn Llan

 

There has been a Significant Name Change to a hill that is listed in the Double Sub-Twmpau adjoined to the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, this height band of hills has two accompanying sub lists, the first of which is entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, and the second sub category is entitled the Double Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 20m and below 30m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and is positioned with the coast on all sides except for its south-east and has a minor road to its south-east and east, and has the village of Llanfair-yng-Nghornwy towards the south. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 29m) notation with an estimated c 27m of drop, based on the 29m summit spot height and an estimated c 2m bwlch height, with the latter based on interpolation of 5m contouring between 0 – 5m that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

The details for this hill have been re-evaluated and it is now listed with 25m of drop, based on the 29m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 4m bwlch spot height that appears on the interactive mapping on the Magic Maps website. 

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 1 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Tyn Llan in the apportionments, with the details on the Tithe map appearing in the parish of Llanrhwydrys and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Tyn Llan, and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tyn Llan

Previously Listed Name:  Pt. 29m 

OS 1:50,000 map:  114

Summit Height:  29m (spot height)

Summit Grid Reference:  SH 32084 93367 (spot height)

Bwlch Height:  4m (spot height)

Bwlch Grid Reference:  SH 32275 93087 (spot height) 

Drop:  25m (spot height summit and bwlch)

 

Myrddyn Phillips (June 2021)

 

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Pen yr Orsedd (SH 325 924) - 55th significant name change

Hill Reclassifications post for Pen yr Orsedd

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north-west and north-east, and is encircled by minor roads with the A5025 road further to its south-east, and has the village of Cemaes towards the east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 44m) notation with an estimated c 21m of drop based on the 44m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 23m bwlch height based on interpolation of 5m contouring between 20m – 25m. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 10 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Pen yr Orsedd in the apportionments, with the details on the Tithe map appearing in the parish of Llanrhwydrys and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Pen yr Orsedd and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Pen yr Orsedd

Previously Listed Name:  Pt. 44m 

OS 1:50,000 map:  114

Summit Height:  44m (spot height) 

Summit Grid Reference:  SH 32516 92447 (spot height) 

Bwlch Height:  c 23m (interpolation) 

Bwlch Grid Reference:  SH 32408 92169 (interpolation) 

Drop:  c 21m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (June 2021)

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Cafnan (SH 347 929) - 54th significant name change

Hill Reclassifications post for Cafnan

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cafnan (SH 347 929)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north, minor roads to its north and south-west and the A5025 road to its south-east, and has the village of Cemaes towards the east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 42m) notation with 23m of drop based on the 42m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 19m bwlch spot height positioned at SH 34895 93133 that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 10 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Cafnan in the apportionments, with the details on the Tithe map appearing in the parish of Llanfechell and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Cafnan and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cafnan

Previously Listed Name:  Pt. 42m 

OS 1:50,000 map:  114

Summit Height:  41.8m (LIDAR) 

Summit Grid Reference:  SH 34714 92915 (LIDAR) 

Bwlch Height:  21.1m (LIDAR) 

Bwlch Grid Reference:  SH 34936 92892 (LIDAR) 

Drop:  20.7m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Tyn y Maes (SH 354 937) - 53rd significant name change

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Tyn y Maes (SH 354 937)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north and west, a minor road to its immediate east and the A5025 road to its south-east, and has the village of Cemaes towards the east south-east. 

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the transposed name of Wylfa, with an accompanying note stating; Name from power station to the West.

Wylfa

40m

SH355937

114

262

Name from power station to the West

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a near power station and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 3 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Tyn y Maes in the apportionments, with the details on the Tithe map appearing in the parish of Llanfechell and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Tyn y Maes and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tyn y Maes

Previously Listed Name:  Wylfa 

OS 1:50,000 map:  114

Summit Height:  40.7m (LIDAR) 

Summit Grid Reference:  SH 35484 93747 (LIDAR) 

Bwlch Height:  15.3m (LIDAR) 

Bwlch Grid Reference:  SH 35494 93505 (LIDAR) 

Drop:  25.3m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Rhwng Dau Fynydd (SH 351 929) - 52nd significant name change

Hill Reclassifications post for Rhwng Dau Fynydd

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Rhwng Dau Fynydd (SH 351 929)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north-west, a minor road to its immediate north and the A5025 road to its south south-east, and has the village of Tregele towards the south-east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

Extract from the Ordnance Survey 1:25,000 Explorer map

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. c 40m) notation with an estimated c 18m of drop based on an estimated c 40m summit height and an estimated c 22m bwlch height, with both heights based on interpolation of 5m contouring that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Tithe map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the apportionments

The enclosed land where the summit of this hill is situated is given the number 11 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Rhwng Dau Fynydd in the apportionments, with the details on the Tithe map appearing in the parish of Llanfechell and in the county named as Anglesey. 

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Rhwng Dau Fynydd and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Rhwng Dau Fynydd

Previously Listed Name:  Pt. c 40m 

OS 1:50,000 map:  114

Summit Height:  42.0m (LIDAR) 

Summit Grid Reference:  SH 35146 92985 (LIDAR) 

Bwlch Height:  22.0m (LIDAR) 

Bwlch Grid Reference:  SH 35426 92899 (LIDAR) 

Drop:  20.0m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Tyddyn Gwydryn Llain Fan (SH 495 681) - 51st significant name change

Hill Reclassifications post for Tyddyn Gwydryn Llain Fan

Significant Height Revisions post for Tyddyn Gwydryn Llain Fan

Summit Relocations post for Tyddyn Gwydryn Llain Fan

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Tyddyn Gwydryn Llain Fan (SH 495 681)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with its summit adjacent to the A4080 road, and has the village of Brynsiencyn towards the south-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

Extract from the Ordnance Survey 1:25,000 Explorer map

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 59m) notation with an estimated c 26m of drop based on the 59m spot height adjoined to a triangulation pillar positioned at SH 49980 68424 and the 59m spot height positioned at SH 50109 68526 and an estimated c 33m bwlch height based on interpolation of 5m contouring between 30m – 35m that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Tithe map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the apportionments

The enclosed land where the summit of this hill is situated is given the number 544 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Tyddyn Gwydryn Llain Fan in the apportionments, with the details on the Tithe map appearing in the parish of Llanidan and in the county named as Anglesey. 

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Tyddyn Gwydryn Llain Fan and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tyddyn Gwydryn Llain Fan

Previously Listed Name:  Pt. 59m 

OS 1:50,000 map:  114, 115

Summit Height:  60.4m (LIDAR) 

Summit Grid Reference:  SH 49584 68102 (LIDAR) 

Bwlch Height:  31.9m (LIDAR) 

Bwlch Grid Reference:  SH 51324 71408 (LIDAR) 

Drop:  28.5m (LIDAR) 

 

Myrddyn Phillips (May 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Cae Canol (SH 498 709) - 50th significant name change

Hill Reclassifications post for Cae Canol

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Cae Canol (SH 498 709)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with a minor road next to its summit and the A5 and A55 roads to its north, and has the village of Llanddaniel-fab towards the south-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 66m) notation with an estimated c 25m of drop based on the 66m summit spot height and an estimated c 41m bwlch height based on interpolation of 5m contouring between 40m – 45m that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 411 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Cae Canol in the apportionments, with the details on the Tithe map appearing in the parish of Llanddaniel and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Cae Canol and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cae Canol

Previously Listed Name:  Pt. 66m 

OS 1:50,000 map:  114, 115

Summit Height:  65.5m (LIDAR) 

Summit Grid Reference:  SH 49886 70969 (LIDAR) 

Bwlch Height:  40.45m (LIDAR) 

Bwlch Grid Reference:  SH 50115 71771 (LIDAR) 

Drop:  25.1m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Menai Rock (SH 555 716) - 49th significant name change

Hill Reclassifications post for Menai Rock

Significant Height Revisions post for Menai Rock

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Menai Rock (SH 555 716)

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the A545 road to its immediate north-west and the A5 road to its south, and has the town of Porthaethwy (Menai Bridge) surrounding it. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 31m) notation with an estimated c 19m of drop based on the 31m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map and an estimated c 12m bwlch height based on interpolation of 5m contouring between 10m – 15m that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 55 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Menai Rock in the apportionments, with the details on the Tithe map appearing in the parish of Llandysilio and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Menai Rock and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Menai Rock

Previously Listed Name:  Pt. 31m 

OS 1:50,000 map:  114, 115

Summit Height:  33.1m (LIDAR) 

Summit Grid Reference:  SH 55569 71697 (LIDAR) 

Bwlch Height:  9.0m (LIDAR) 

Bwlch Grid Reference:  SH 55622 72078 (LIDAR) 

Drop:  24.1m (LIDAR)

 

Myrddyn Phillips (May 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Castell (SN 585 789) - 48th significant name change

Survey post for Castell

Hill Reclassifications post for Castell

Significant Height Revisions post for Castell

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis and a subsequent Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

The view from the summit of Castell (SN 585 789)

The criteria for the two listings that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Elenydd group of hills which are situated in the central part of the Mid and West Wales Region (Region B, Sub-Region B2), and it is positioned with the coast to its west, the Afon Ystwyth to its east and the A487 road farther to its east, and has the town of Aberystwyth towards the north. 

Extract from the Ordnance Survey 1:25,000 Explorer map

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the name of Y Castell, with an accompanying note stating; Name from ring and bailey at summit.

Y Castell

73m

SN585790

135

213

Name from ring and bailey at summit

 

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and the interactive mapping on the Magic Maps and WalkLakes websites.  Two of the historic maps now available online are the Draft Surveyors map and the Ordnance Survey One-Inch ‘Old Series’ map and it is these maps that form the basis for the compositional change in this hill’s listed name. 

The Draft Surveyor maps consist of the preliminary drawings made by the Ordnance Survey surveyors between the 1780s and 1840 and formed the basis for the first publicly available One-Inch map.  They were drawn at scales of six inches to the mile for areas considered of particular military significance and down to two inches to the mile for other areas.  Fair copies were then produced from these preliminary drawings to one inch to the mile and then copper plates were prepared for printing.  The Draft Surveyors maps for the whole of Wales are now available online and they form an important part in the study of Welsh upland place-names as they bridge the time frame between the late 18^th century and the mid-19^th century when the Ordnance Survey produced their first One-Inch maps, and importantly for this hill and its listed name, it is this map that shows the name as Castell, without the use of the definite article Y. 

Extract from the Ordnance Survey Draft Surveyors map

The One-Inch ‘Old Series’ map was the first map that Ordnance Survey had published and this culminated from the whole of Britain being surveyed between 1791 and 1874 and the detail gathered therein produced at a scale of one inch to the mile and published in sheet format between 1805 and 1874.  The One-Inch ‘Old Series’ maps for the whole of Wales are now available online; they are also available in map format as enlarged and re-projected versions to match the scale and dimensions of the Ordnance Survey 1:50,000 Landranger series and are published by Cassini.  This series of maps form another important part in the study of Welsh upland place-names and bridge the time frame leading up to the production of the Ordnance Survey base map of the Six-Inch series, and importantly for this hill and its listed name, it is also this map that shows the name as Castell, without the use of the definite article Y. 

Extract from the Ordnance Survey One-Inch 'Old Series' map

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Castell and the composition and confirmation of its name was derived from the Ordnance Survey Draft Surveyors map and the One-Inch ‘Old Series’ map. 

 

The full details for the hill are: 

Group:  Elenydd 

Name:  Castell

Previously Listed Name:  Y Castell 

OS 1:50,000 map:  135

Summit Height:  77.2m (converted to OSGM15, Trimble GeoXH 6000) 

Summit Grid Reference:  SN 58516 78997 (Trimble GeoXH 6000) 

Bwlch Height:  42.3m (LIDAR) 

Bwlch Grid Reference:  SN 58197 78954 (LIDAR) 

Drop:  34.9m (Trimble GeoXH 6000 summit and LIDAR bwlch) 

Dominance:  45.21% (Trimble GeoXH 6000 summit and LIDAR bwlch) 

 

Myrddyn Phillips (April 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Ynys Fach (SN 668 951) - 47th significant name change

Hill Reclassifications post for Ynys Fach

Significant Height Revisions post for Ynys Fach

Summit Relocations post for Ynys Fach

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill derived by Joe Nuttall who produced a summit analysis programme using LIDAR, and then by LIDAR analysis initially conducted by Jim Bloomer and subsequently by Myrddyn Phillips. 

LIDAR image of Ynys Fach (SN 668 951)

The criteria for the two listings that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Pumlumon group of hills which are situated in the north-western part of Mid and West Wales (Region B, Sub-Region B2), and it has the A487 road to its south-east and the town of Machynlleth towards the north-east. 

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the transposed name of Ynys Greigiog, which is a prominent name that appears adjacent to this hill on contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps.

Ynys Greigiog

30c

SN670948

135

23

 

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore, I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate. 

Extract from the Ordnance Survey 1:25,000 Explorer map

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and the interactive mapping on the Magic Maps and WalkLakes websites, and it is the Ordnance Survey series of Six-Inch maps that give the name of Ynys Fach. 

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Ynys Fach and this was derived from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are: 

Group:  Pumlumon 

Name:  Ynys Fach

Previously Listed Name:  Ynys Greigiog 

OS 1:50,000 map:  135

Summit Height:  43.5m (LIDAR) 

Summit Grid Reference:  SN 66845 95141 (LIDAR) 

Bwlch Height:  2.1m (LIDAR) 

Bwlch Grid Reference:  SN 67483 95096 (LIDAR) 

Drop:  41.3m (LIDAR) 

Dominance:  95.10% (LIDAR)

 

Myrddyn Phillips (April 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Ponciau Tre Wilmot (SH 227 816) - 46th significant name change

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data and by LIDAR analysis conducted by Myrddyn Phillips. 

Ponciau Tre Wilmot (SH 227 816)

The criteria for the two listings that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned on Ynys Gybi (Holyhead Island) to the west of Ynys Môn, and is encircled by minor roads with the A55 farther to its east, and has the town of Caergybi (Holyhead) towards the east. 

The hill appeared in the original 30-99m Welsh P30list on Geoff Crowder’s v-g.me website under the transposed name of Tre-wilmot, with an accompanying note stating; Name from buildings to the North-West.

Tre-wilmot

77m

SH228817

114

262

Name from buildings to the North-West

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of an old farm and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

This was one of a number of hills visited during the day and I was eventually directed to Wyn Roberts who lives at Glan Gors Goch Uchaf.  As I explained my interest in the hill and its name, Wyn invited me in and offered me a cup of tea, explaining as he did so that the name of the series of little tops that take in this hill is Ponciau Tre Wilmot. 

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Ponciau Tre Wilmot and this was derived from local enquiry.

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Ponciau Tre Wilmot

Previously Listed Name:  Tre-wilmot 

OS 1:50,000 map:  114

Summit Height:  76.6m (LIDAR)

Summit Grid Reference:  SH 22772 81657 (LIDAR)

Bwlch Height:  c 38m (interpolation)

Bwlch Grid Reference:  SH 21685 81120 (interpolation) 

Drop:  c 39m (LIDAR summit and interpolated bwlch)

Dominance:  50.41% (LIDAR summit and interpolated bwlch)

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Cae’r Hafod (SH 237 800) - 45th significant name change

Hill Reclassifications post for Cae'r Hafod

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau – Welsh hills at or above 30m and below 100m in height that have 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its south-west and minor roads to its north-west and south and the B4545 road to its east, and has the village of Trearddur towards the east south-east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 38m) notation with 20m of drop based on the 38m summit spot height and the 18m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 1140 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Cae’r Hafod in the apportionments, with the details on the Tithe map appearing in the parish of Holyhead and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Cae’r Hafod and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cae’r Hafod

Previously Listed Name:  Pt. 38m 

OS 1:50,000 map:  114

Summit Height:  38m (spot height)

Summit Grid Reference:  SH 23732 80023 (spot height)

Bwlch Height:  18m (spot height)

Bwlch Grid Reference:  SH 23844 80805 (spot height) 

Drop:  20m (spot height summit and bwlch)

 

Myrddyn Phillips (April 2021)

 

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Mynydd (SH 255 773) - 44th significant name change

Hill Reclassifications post for Mynydd

 

There has been a Significant Name Change to a hill that is listed in the Double Sub-Twmpau adjoined to the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, this height band of hills has two accompanying sub lists, the first of which is entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, and the second sub category is entitled the Double Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 20m and below 30m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), as it is positioned with the coast to its south-west, minor roads to its north and east and the B4545 road to its north-east, and has the village of Trearddur towards the north. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 24m) notation with an estimated c 20m of drop, based on the 24m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map and which now appears on the interactive mapping hosted on the Geograph website and an estimated c 4m bwlch height based on interpolation of 5m contouring between 0 – 5m that appear on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 1720 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Mynydd in the apportionments, with the details on the Tithe map appearing in the parish of Holyhead and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Mynydd, and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Mynydd

Previously Listed Name:  Pt. 24m 

OS 1:50,000 map:  114

Summit Height:  24m (spot height)

Summit Grid Reference:  SH 25599 77361 (spot height)

Bwlch Height:  c 4m (interpolation)

Bwlch Grid Reference:  SH 26020 77050 (interpolation) 

Drop:  c 20m (spot height summit and interpolated bwlch)

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Cadair Pedwar Gwynt (SH 263 753) - 43rd significant name change

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

Cadair Pedwar Gwynt (SH 263 753)

The criteria for the two listings that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned on Ynys Gybi (Holyhead Island) to the west of Ynys Môn, and has the coast to its immediate south-west and minor roads to its north-east and the B4545 road farther to its north, and has the village of Trearddur towards the north north-west. 

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the transposed name of Hirfron, with an accompanying note stating; Name from buildings to the East.

Hirfron

63m

SH263753

114

262

Trig pillar. Name from buildings to the East

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a near building and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

Extract from the Ordnance Survey 1:25,000 Explorer map

This was one of a number of hills visited during the day and before starting the short walk to its summit I made local enquiries concerning its name, starting at the White Eagle pub.  I was directed by four people who were finishing their lunch to Haulfryn, where Susan Roberts lived.  Susan is a school teacher and was sitting on a reclining chair with a duvet over her having not gone to work due to illness.  She invited me in and we chatted for about 30 minutes and she told me the high point of the hill is known as Cadair Pedwar Gwynt after the seat constructed on its summit, explaining that it is also known as Lady Verney’s Seat. 

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Cadair Pedwar Gwynt, and this was derived from local enquiry. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cadair Pedwar Gwynt

Previously Listed Name:  Hirfron 

OS 1:50,000 map:  114

Summit Height:  63.7m (LIDAR)

Summit Grid Reference:  SH 26346 75302 (LIDAR)

Bwlch Height:  4.45m (LIDAR)

Bwlch Grid Reference:  SH 25393 79147 (LIDAR) 

Drop:  59.3m (LIDAR)

Dominance:  93.02% (LIDAR)

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Clegyrog Ganol (SH 385 894) - 42nd significant name change

Hill Reclassifications post for Clegyrog Ganol

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is encircled by minor roads with the A5025 road farther to the north-west and the B5111 road farther to the east, and has the village of Llanfechell towards the north-west. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the main P30 or the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for either category. 

Extract from the Ordnance Survey 1:25,000 Explorer map

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 99m) notation with an estimated c 31m of drop based on the 99m summit spot height that appeared on the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, and an estimated c 68m bwlch height based on interpolation of 5m contouring between 65m – 70m that appears on the Ordnance Survey 1:25,000 Explorer map. 

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 98 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Clegyrog Ganol in the apportionments, with the details on the Tithe map appearing in the parish of Llanbadrig and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau is Clegyrog Ganol, and this name was derived from the Tithe map.

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Clegyrog Ganol

Previously Listed Name:  Pt. 99m 

OS 1:50,000 map:  114

Summit Height:  99m (spot height) 

Summit Grid Reference:  SH 38569 89439 (hand-held GPS via DoBIH) 

Bwlch Height:  c 68m (interpolation) 

Bwlch Grid Reference:  SH 40950 89190 (interpolation) 

Drop:  c 31m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (March 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Llanlleiana Park (SH 383 949) - 41st significant name change

Survey post for Llanlleiana Park 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill derived from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

Llanlleiana Park (SH 383 949)

The criteria for the two listings that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast immediately to its north and a minor road to its south with the A5025 road farther to its south, and has the village of Cemaes towards the south-west. 

Extract from the Ordnance Survey 1:25,000 Explorer map

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the invented and transposed name of Moel Llanlleiana, with an accompanying note staying; Name from buildings to the South-East.

Moel Llanlleiana

65c

SH383950

114

262

Name from buildings to the South-East

 

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found. 

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 248 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Llanlleiana Park in the apportionments, with the details on the Tithe map appearing in the parish of Amlwch and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Llanlleiana Park, and this name was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Llanlleiana Park

Previously Listed Name:  Moel Llanlleiana 

OS 1:50,000 map:  114

Summit Height:  68.2m (converted to OSGM15) 

Summit Grid Reference:  SH 38337 94993 

Bwlch Height:  34.2m (converted to OSGM15) 

Bwlch Grid Reference:  SH 38745 94536 

Drop:  34.0m 

Dominance:  49.85%

 

Myrddyn Phillips (March 2021)

 

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Glan y Morfa (SH 438 679) - 40th significant name change

Hill Reclassifications post for Glan y Morfa

 

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Glan y Morfa (SH 438 679)

The criteria for the two listings that this name change applies to are: 

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format. 

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with a minor road to its north and the A4421 to its south-east, and has the village of Llangaffo towards the north-east. 

When the original 30-99m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category. 

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with twin tops both with a 59m summit spot height (59m at SH 43811 67899 on the Ordnance Survey 1:25,000 Explorer map and 59m at SH 45087 68972 on the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map).  LIDAR has now confirmed which top is higher and this was listed under the point (Pt. 59m) notation. 

Extract from the Ordnance Survey 1:25,000 Explorer map

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales. 

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 8 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Glan y Morfa in the apportionments, with the details on the Tithe map appearing in the parish of Llangeinwen and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Glan y Morfa, and this name was derived from the Tithe map.

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Glan y Morfa

Previously Listed Name:  Pt. 59m 

OS 1:50,000 map:  114, 115

Summit Height:  59.2m (LIDAR) 

Summit Grid Reference:  SH 43819 67923 (LIDAR) 

Bwlch Height:  27.9m (LIDAR) 

Bwlch Grid Reference:  SH 45679 69377 (LIDAR) 

Drop:  31.3m (LIDAR) 

Dominance:  52.85% (LIDAR)

 

Myrddyn Phillips (March 2021)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

The Larches (ST 433 899) - 39th significant name change

Significant Height Revisions post for The Larches

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips.

LIDAR image of The Larches (ST 433 899)

The criteria for the two listings that this name change applies to are:

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward.

The 30-99m Twmpau by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format.

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Gwent Is Coed group of hills which are situated in the south-eastern part of South Wales (Region C, Sub-Region C3), and it is positioned with minor roads to its north, west, south and east and further afield has the A48 road to its north and the M4 motorway to its south, and has the city of Casnewydd (Newport) towards the west.

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the name of Coed y Mynydd, which is a prominent name that appears on Ordnance Survey 1:25,000 Explorer maps close to the summit of this hill. 

Coed y Mynydd

85c

ST433899

171/172

154

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore, I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate.

Extract from the Ordnance Survey 1:25,000 Explorer map

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map and the mapping on the Magic Maps website, and it is the latter map and the series of Six-Inch maps that name the area taking in the summit of this hill as The Larches.

Extract from the Magic Maps website

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is The Larches, and this was derived from the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map, the mapping on the Magic Maps website and the series of Ordnance Survey Six-Inch maps. 

The full details for the hill are:

Group:  Gwent Is Coed

Name:  The Larches

Previously Listed Name:  Coed y Mynydd

OS 1:50,000 map:  171, 172

Summit Height:  91.1m (LIDAR)

Summit Grid Reference:  ST 43303 89957 (LIDAR)

Bwlch Height:  22.3m (LIDAR)

Bwlch Grid Reference:  ST 42928 90248 (LIDAR)

 

Drop:  68.8m (LIDAR)

Dominance:  75.54% (LIDAR)

Myrddyn Phillips (September 2020)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

High Grove Wood (ST 423 898) - 38th significant name change

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips.

LIDAR image of High Grove Wood (ST 423 898)

The criteria for the two listings that this name change applies to are:

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward.

The 30-99m Twmpau - The 30m - 99m Hills of Wales by Myrddyn Phillips

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format.

Y Trechol - The Dominant Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Gwent Is Coed group of hills which are situated in the south-eastern part of South Wales (Region C, Sub-Region C3), and it is positioned with the A48 road to its north and the M4 motorway to south, and has the city of Casnewydd (Newport) towards the west.

Extract from the Ordnance Survey 1:25,000 Explorer map

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the name of High Grove, which is a name that appears close to this hill’s summit on contemporary Ordnance Survey 1:25,000 Explorer maps.

High Grove

92m

ST424897

171/172

154

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate.

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales.

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 181 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as High Grove Wood in the apportionments, with the details on the Tithe map appearing in the parish of Saint Brides Netherwent and in the county named as Monmouth.

Extract from the apportionments

Although the name High Grove is probably a shortened version of the name that appears on the Tithe, it is the full Tithe name that is now prioritised.  Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is High Grove Wood, and this name was derived from the Tithe map.

The full details for the hill are:

Group:  Gwent Is Coed

Name:  High Grove Wood

Previously Listed Name:  High Grove

OS 1:50,000 map:  171, 172

Summit Height:  91.1m (LIDAR)

Summit Grid Reference:  ST 42386 89851 (LIDAR)

Bwlch Height:  59.1m (LIDAR)

Bwlch Grid Reference:  ST 42368 90194 (LIDAR) 

Drop:  32.0m (LIDAR)

Dominance:  35.08% (LIDAR)

Myrddyn Phillips (September 2020)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Lady Hill (ST 344 883) - 37th significant name change

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips.

LIDAR image of Lady Hill (ST 344 883)

The criteria for the two listings that this name change applies to are:

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward.

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format.

The hill is adjoined to the Gwent Is Coed group of hills which are situated in the south-eastern part of South Wales (Region C, Sub-Region C3), and it is positioned with the B4237 road and the M4 motorway to its north-west, and the A48 road to its south and east, and is situated in the eastern outskirts of the city of Casnewydd (Newport).

Extract from the Ordnance Survey 1:25,000 Explorer map

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the name of Alway, which is a prominent name that appears on Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps close to the summit of this hill, and which online sources indicate is more applicable to an electoral ward and community rather than the hill itself.

Alway

60c

ST344883

171

152

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate.

Extract from the Ordnance Survey series of Six-Inch maps

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map and the mapping on the Magic Maps website, and it is the latter map and the series of Six-Inch maps that name the area taking in the summit of this hill as Lady Hill.

Extract from the Magic Maps website

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Lady Hill, and this was derived from the Ordnance Survey mapping on the Magic Maps website and the series of Ordnance Survey Six-Inch maps. 

The full details for the hill are:

Group:  Gwent Is Coed

Name:  Lady Hill

Previously Listed Name:  Alway

OS 1:50,000 map:  171

Summit Height:  64.4m (LIDAR)

Summit Grid Reference:  ST 34405 88307 (LIDAR)

Bwlch Height:  30.1m (LIDAR)

Bwlch Grid Reference:  ST 34264 88442 (LIDAR) 

Drop:  34.3m (LIDAR)

Dominance:  53.20% (LIDAR)

Myrddyn Phillips (August 2020)

Mapping Mountains - Significant Name Changes - 30-99m Twmpau

Ringland Top (ST 353 885) - 36th significant name change

There has been a Significant Name Change to a hill that is listed in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales, with the summit height, bwlch height and their locations, the drop, dominance and status of the hill confirmed by LIDAR analysis conducted by Myrddyn Phillips.

LIDAR image of Ringland Top (ST 353 885)

The criteria for the two listings that this name change applies to are:

30-99m Twmpau - Welsh hills at or above 30m and below 100m in height with 30m minimum drop, with an accompanying sub list entitled the 30-99m Sub-Twmpau with the criteria for this sub category being all Welsh hills at or above 30m and below 100m in height with 20m or more and below 30m of drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward.

Y Trechol – The Dominant Hills of Wales – Welsh P30 hills whose prominence equal or exceed half that of their absolute height.  With the criteria for Lesser Dominant status being those additional Welsh P30 hills whose prominence is between one third and half that of their absolute height.  The list is authored by Myrddyn Phillips with the Introduction to the start of the Mapping Mountains publication of this list appearing on the 3^rd December 2015, and which is now available in its entirety on Mapping Mountains in Google Doc format.

The hill is adjoined to the Gwent Is Coed group of hills which are situated in the south-eastern part of South Wales (Region C, Sub-Region C3), and it is positioned with the B4237 road and the M4 motorway to its north-west, and the A48 road to its south and east, and is positioned in the eastern outskirts of the city of Casnewydd (Newport).

Extract from the Ordnance Survey 1:25,000 Explorer map

The hill appeared in the original 30-99m Welsh P30 list on Geoff Crowder’s v-g.me website under the name of The Circles, which online sources indicate is more applicable to a housing estate rather than the hill. 

The Circles

66m

ST353885

171

152

During my early hill listing I paid little regard to name placement on the map, or the meaning of names and to what feature the name was appropriately applied to.  Therefore I prioritised names for listing purposes that I now understand are either inappropriate or where another name is viewed as being more appropriate.

Extract from the Ordnance Survey series of Six-Inch maps

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map and the mapping on the Magic Maps website, and it is the latter map and the series of Six-Inch maps that name the area taking in the summit of this hill as Ringland Top.

Extract from the Magic Maps website

Therefore, the name this hill is now listed by in the 30-99m Twmpau and Y Trechol – The Dominant Hills of Wales is Ringland Top, and this was derived from the Ordnance Survey mapping on the Magic Maps website and the series of Ordnance Survey Six-Inch maps. 

The full details for the hill are:

Group:  Gwent Is Coed

Name:  Ringland Top

Previously Listed Name:  The Circles

OS 1:50,000 map:  171

Summit Height:  67.3m (LIDAR)

Summit Grid Reference:  ST 35318 88536 (LIDAR)

Bwlch Height:  25.6m (LIDAR)

Bwlch Grid Reference:  ST 35529 88767 (LIDAR) 

Drop:  41.7m (LIDAR)

Dominance:  61.95% (LIDAR)

Myrddyn Phillips (August 2020)