Mapping Mountains – Significant Name Changes – The Welsh P15s

 

The Welsh P15s – Significant Name Changes

The Welsh P15s are all Welsh hills that have a minimum of 15m of drop, irrespective of their height.  Accompanying the main P15 list is a sub list entitled; The Welsh Sub-P15s, with the qualification to this sub category being all Welsh hills with 14m or more and below 15m 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 P15 list and the sub list that are below P20 and therefore documented in other lists, appear below presented chronologically in receding order.

Mapping Mountains - Significant Name Changes - The Welsh P15s

Werthyr (SH 411 925) - 35th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Werthyr (SH 411 925)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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, the A5025 road also to its north and minor roads to its west, south and east, and has the town of Amlwch towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 67m) notation with an estimated c 19m of drop based on the 67m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 48m bwlch height based on interpolation of 5m contouring between 45m – 50m. 

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 201 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 Werthyr 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 Welsh P15s is Werthyr and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Werthyr

Previously Listed Name:  Pt. 67m 

OS 1:50,000 map:  114

Summit Height:  66.9m (LIDAR) 

Summit Grid Reference:  SH 41105 92527 (LIDAR) 

Bwlch Height:  47.1m (LIDAR) 

Bwlch Grid Reference:  SH 41279 93579 (LIDAR) 

Drop:  19.8m (LIDAR) 

 

Myrddyn Phillips (July 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Ysgellog & Minffordd (SH 409 912) - 34th significant name change

Significant Height Revisions post for Ysgellog & Minffordd

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Ysgellog & Minffordd (SH 409 912)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 and the B5111 road farther to the south-east, and has the town of Amlwch towards the east north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 65m) notation with an estimated c 23m of drop based on an estimated c 65m summit height and the 42m 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 143 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 Ysgellog & Minffordd 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 Welsh P15s is Ysgellog & Minffordd and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Ysgellog & Minffordd

Previously Listed Name:  Pt. c 65m 

OS 1:50,000 map:  114

Summit Height:  60.2m (LIDAR) 

Summit Grid Reference:  SH 40921 91218 & SH 40923 91218 & SH 40925 91220 (LIDAR) 

Bwlch Height:  41.7m (LIDAR) 

Bwlch Grid Reference:  SH 40915 91509 (LIDAR) 

Drop:  18.5m (LIDAR) 

 

Myrddyn Phillips (July 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Hafod y Llin (SH 406 918) - 33rd significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Hafod y Llin (SH 406 918)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 is encircled by minor roads with the A5025 road farther to its north, and has the town of Amlwch towards the east north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 65m) notation with an estimated c 17m of drop, based on an estimated c 65m summit height and an estimated c 48m 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 144 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 Hafod y Llin 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 Welsh P15s is Hafod y Llin and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Hafod y Llin

Previously Listed Name:  Pt. c 65m 

OS 1:50,000 map:  114

Summit Height:  65.4m (LIDAR)                                                           

Summit Grid Reference:  SH 40655 91834 (LIDAR) 

Bwlch Height:  47.4m (LIDAR) 

Bwlch Grid Reference:  SH 40969 91722 & SH 40969 91720 & SH 40968 91718 (LIDAR) 

Drop:  18.0m (LIDAR) 

 

Myrddyn Phillips (July 2021)

 

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Bonc (SJ 129 121) - 32nd significant name change

Survey post for Cae Bonc

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill confirmed by LIDAR analysis and a subsequent Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 

Cae Bonc (SJ 129 121)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The hill is adjoined to the Y Berwyn group of hills, which are situated in the south-eastern part of North Wales (Region A, Sub-Region A4), and it is positioned with minor roads to its north-east, north-west and south and the A495 road to its south-east, and has the village of Meifod towards the east north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 145m) notation with 20m of drop, based on the 145m summit spot height and the 125m 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 364 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 Bonc in the apportionments, with the details on the Tithe map appearing in the parish of Meifod and in the county named as Montgomery. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Cae Bonc and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Y Berwyn 

Name:  Cae Bonc

Previously Listed Name:  Pt. 145m 

OS 1:50,000 map:  125

Summit Height:  144.8m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference:  SJ 12918 12172 (Trimble GeoXH 6000)

Bwlch Height:  124.9m (LIDAR)

Bwlch Grid Reference:  SJ 12993 12315 (LIDAR)

Drop:  19.8m (Trimble GeoXH 6000 summit and LIDAR bwlch) 

 

Myrddyn Phillips (July 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Trogog Uchaf (SH 416 918) - 31st significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Trogog Uchaf (SH 416 918)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 and B5111 roads to its north-east and minor road to its west, south and east, and has the town of Amlwch towards the east north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 64m) notation with an estimated c 17m of drop, based on the 64m 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 47m bwlch height based on interpolation of 5m contouring between 45m – 50m 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

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 147 & 198 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 Trogog Uchaf 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 Welsh P15s is Trogog Uchaf and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Trogog Uchaf

Previously Listed Name:  Pt. 64m 

OS 1:50,000 map:  114

Summit Height:  65.0m (LIDAR)                                                           

Summit Grid Reference:  SH 41682 91889 (LIDAR) 

Bwlch Height:  46.55m (LIDAR) 

Bwlch Grid Reference:  SH 41508 92042 (LIDAR) 

Drop:  18.5m (LIDAR) 

 

Myrddyn Phillips (July 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Mynydd Madyn (SH 454 933) - 30th significant name change

Hill Reclassifications post for Mynydd Madyn

 

There has been a Significant Name Change to a hill that used to be listed in The Welsh P15s, 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 Mynydd Madyn (SH 454 933)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 a minor road to its south, and has the town of Amlwch towards the immediate west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 42m) notation with an estimated c 14m of drop, based on the 42m 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 28m bwlch height based on interpolation of 5m contouring between 25m – 30m 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 289 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 Madyn 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 used to be listed by in The Welsh P15s is Mynydd Madyn and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Mynydd Madyn

Previously Listed Name:  Pt. 42m 

OS 1:50,000 map:  114

Summit Height:  40.9m (LIDAR)                                                           

Summit Grid Reference:  SH 45430 93304 (LIDAR) 

Bwlch Height:  27.6m (LIDAR) 

Bwlch Grid Reference:  SH 45414 93172 (LIDAR) 

Drop:  13.2m (LIDAR) 

 

Myrddyn Phillips (July 2021)

 

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tan yr Allt (SH 320 837) - 29th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Tan yr Allt (SH 320 837)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 40m) notation with an estimated c 17m of drop, based on an estimated c 40m summit height and an estimated c 23m 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 14 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 Tan yr Allt in the apportionments, with the details on the Tithe map appearing in the parish of Llanfachreth and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is listed by in The Welsh P15s is Tan yr Allt and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tan yr Allt

Previously Listed Name:  Pt. c 40m 

OS 1:50,000 map:  114

Summit Height:  39.7m (LIDAR)                                                           

Summit Grid Reference:  SH 32069 83702 (LIDAR) 

Bwlch Height:  24.0m (LIDAR) 

Bwlch Grid Reference:  SH 32344 83807 (LIDAR) 

Drop:  15.7m (LIDAR) 

 

Myrddyn Phillips (June 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Bodlasan Fawr (SH 300 825) - 28th significant name change

Hill Reclassifications post for Bodlasan Fawr

 

There has been a Significant Name Change to a hill that used to be listed in The Welsh P15s, 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 Bodlasan Fawr (SH 300 825)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 and the A5025 road to its east, and has the village of Llanfachreth towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 23m) notation with an estimated c 15m of drop, based on the 23m 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 8m bwlch height, based on interpolation of 5m contouring between 5m – 10m 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 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 Bodlasan Fawr in the apportionments, with the details on the Tithe map appearing in the parish of Llanfachreth and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill used to be listed by in The Welsh P15s is Bodlasan Fawr and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Bodlasan Fawr

Previously Listed Name:  Pt. 23m 

OS 1:50,000 map:  114

Summit Height:  21.9m (LIDAR)                                                           

Summit Grid Reference:  SH 30056 82550 (LIDAR) 

Bwlch Height:  8.1m (LIDAR) 

Bwlch Grid Reference:  SH 30641 82944 (LIDAR) 

Drop:  13.8m (LIDAR) 

 

Myrddyn Phillips (June 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Plas Cemlyn (SH 327 936) - 27th significant name change

Significant Height Revisions post for Plas Cemlyn

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Plas Cemlyn (SH 327 936)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 almost entirely surrounded by the coast with minor roads to its south and south-east, and has the village of Cemaes towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 18m) notation with an estimated c 15m of drop, based on the 18m 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, with this spot height now appearing on the interactive mapping on the Magic Maps website and an estimated c 3m bwlch height based on interpolation of 5m contouring between 0 – 5m. 

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 2 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 Plas Cemlyn 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 Welsh P15s is Plas Cemlyn and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Plas Cemlyn

Previously Listed Name:  Pt. 18m 

OS 1:50,000 map:  114

Summit Height:  20.3m (LIDAR)                                                           

Summit Grid Reference:  SH 32729 93641 (LIDAR) 

Bwlch Height:  2.3m (LIDAR) 

Bwlch Grid Reference:  SH 32454 93517 (LIDAR) 

Drop:  18.0m (LIDAR) 

 

Myrddyn Phillips (June 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Pen yr Orsedd (SH 331 922) - 26th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Pen yr Orsedd (SH 331 922)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 is encircled by minor roads with the A5025 road farther to its south-east, and has the small community of Llanfair-yng-Nghornwy towards the south south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 39m) notation with an estimated c 17m of drop, based on the 39m 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 estimate c 22m 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 Welsh P15s 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. 39m 

OS 1:50,000 map:  114

Summit Height:  38.0m (LIDAR)                                                           

Summit Grid Reference:  SH 33194 92272 (LIDAR) 

Bwlch Height:  c 22m (interpolation) 

Bwlch Grid Reference:  SH 32953 92329 (interpolation) 

Drop:  c 16m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (June 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Wylfa (SH 353 936) - 25th significant name change

Significant Height Revisions post for Wylfa

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Wylfa (SH 353 396)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 east and a minor road and the A5025 road farther to its south-east, and has the village of Cemaes towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 36m) notation with an estimated c 18m of drop, based on an estimated c 36m summit height and an estimated c 18m 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 2 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 Wylfa 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 Welsh P15s is Wylfa and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Wylfa

Previously Listed Name:  Pt. c 36m 

OS 1:50,000 map:  114

Summit Height (New Height):  38.2m (LIDAR)                                                           

Summit Grid Reference:  SH 35343 93609 (LIDAR) 

Bwlch Height:  20.45m (LIDAR) 

Bwlch Grid Reference:  SH 35438 93650 (LIDAR) 

Drop:  17.8m (LIDAR) 

 

Myrddyn Phillips (June 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Wylfa (SH 353 939) - 24th significant name change

Hill Reclassifications post for Wylfa

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Wylfa (SH 353 939)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 east and has a minor road and the A5025 road farther to its south-east, and has the village of Cemaes towards the east south-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 37m) notation with an estimated c 15m of drop, based on the 37m 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 22m bwlch height based on interpolation of 5m contouring between 20m – 25m 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 2 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 Wylfa 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 Welsh P15s is Wylfa and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Wylfa

Previously Listed Name:  Pt. 37m 

OS 1:50,000 map:  114

Summit Height:  38.1m (LIDAR)                                                           

Summit Grid Reference:  SH 35376 93925 (LIDAR) 

Bwlch Height:  23.9m (LIDAR) 

Bwlch Grid Reference:  SH 35428 93863 (LIDAR) 

Drop:  14.2m (LIDAR) 

 

Myrddyn Phillips (June 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Gwyddelyn (SH 362 930) - 23rd significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Gwyddelyn (SH 362 930)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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, the A5025 road to its immediate north and minor roads to its south and south-east, and has the village of Cemaes towards the east north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 39m) notation with an estimated c 16m of drop, based on the 39m 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 23m bwlch height based on interpolation of 5m contouring between 20m – 25m 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 69 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 Gwyddelyn 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 Welsh P15s is Gwyddelyn and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Gwyddelyn

Previously Listed Name:  Pt. 39m 

OS 1:50,000 map:  114

Summit Height:  39.2m (LIDAR) 

Summit Grid Reference:  SH 36256 93007 (LIDAR) 

Bwlch Height:  23.7m (LIDAR) 

Bwlch Grid Reference:  SH 35685 92706 & SH 35685 92704 & SH 35684 92703 (LIDAR) 

Drop:  15.5m (LIDAR) 

 

Myrddyn Phillips (June 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Melin y Borth (SH 448 934) - 22nd significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Melin y Borth (SH 448 934)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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, a minor road to its south and the A5025 road to its west, and has the town of Amlwch towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed by the name of Mona Mill, with an estimated c 14m of drop, based on an estimated c 33m summit height and an estimated c 19m 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

The name of Melin y Borth is taken from online sources and substantiated by present day documentation, some of which is given by Coflein, which is the online database for the National Monuments Record of Wales and also by a number of other online sites, including Wikimedia Commons. 

In such instances and especially so for such a low heighted and low prominence hill it is appropriate to use a name given to an inanimate object for that of the hill, as this is one of if not the main named feature on this hill. 

Therefore, the name this hill is now listed by in The Welsh P15s is Melin y Borth and this was derived from online sources including Coflein. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Melin y Borth

Previously Listed Name:  Mona Mill 

OS 1:50,000 map:  114

Summit Height:  34.1m (LIDAR)                                                           

Summit Grid Reference:  SH 44859 93412 (LIDAR) 

Bwlch Height:  19.4m (LIDAR) 

Bwlch Grid Reference:  SH 44761 93327 (LIDAR) 

Drop:  14.8m (LIDAR) 

 

Myrddyn Phillips (June 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Felin Wynt (SH 608 811) - 21st significant name change

Hill Reclassifications post for Felin Wynt

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Felin Wynt (SH 608 811)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 with minor roads to its west, south and east, and has the small community of Glan-yr-afon towards the west south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 94m) notation with 13m of drop, based on the 94m summit and 81m bwlch spot heights 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 26 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 Felin Wynt in the apportionments, with the details on the Tithe map appearing in the parish of Llangoed and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Felin Wynt and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Felin Wynt

Previously Listed Name:  Pt. 94m 

OS 1:50,000 map:  114, 115

Summit Height:  95.2m (LIDAR)                                                           

Summit Grid Reference:  SH 60835 81107 (LIDAR) 

Bwlch Height:  81m (spot height) 

Bwlch Grid Reference:  SH 61129 80980 (spot height) 

Drop:  14m (LIDAR summit and spot height bwlch) 

 

Myrddyn Phillips (June 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Bryn Celli Wen (SH 513 701) - 20th significant name change

Summit Relocations post for Cae Bryn Celli Wen

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Bryn Celli Wen (SH 513 701)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 A5 and A55 roads to its north, minor roads to its north-west and south-west and the A4080 road to its east, and has the village of Llanfair Pwllgwyngyll towards the north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 51m) notation with an estimated c 17m of drop, based on an estimated c 51m summit height and a 34m bwlch height based on the spot height that appears on the Ordnance Survey 1:50,000 Landranger and 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 107 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 Bryn Celli Wen in the apportionments, with the details on the Tithe map appearing in the parish of Llanedwen and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Cae Bryn Celli Wen and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cae Bryn Celli Wen

Previously Listed Name:  Pt. c 51m 

OS 1:50,000 map:  114, 115

Summit Height:  51.3m (LIDAR) 

Summit Grid Reference:  SH 51314 70143 (LIDAR) 

Bwlch Height:  33.3m (LIDAR) 

Bwlch Grid Reference:  SH 51742 69854 (LIDAR) 

Drop:  18.0m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cefn Maesoglen (SH 456 677) - 19th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Cefn Maesoglen (SH 456 677)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 immediate north, the B4419 road to its north-west and west and the A4080 road to its south-east, and has the village of Dwyran towards the south south-west. 

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

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 46m) notation with 15m of drop, based on the 46m summit spot height and the 31m bwlch spot height 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 39 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 Cefn Maesoglen in the apportionments, with the details on the Tithe map appearing in the parish of Llangeinwen and in the county named as Anglesey. 

Therefore, the name this hill is now listed by in The Welsh P15s is Cefn Maesoglen and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cefn Maesoglen

Previously Listed Name:  Pt. 46m 

OS 1:50,000 map:  114, 115

Summit Height:  47.2m (LIDAR)                                                           

Summit Grid Reference:  SH 45613 67770 (LIDAR) 

Bwlch Height:  30.9m (LIDAR) 

Bwlch Grid Reference:  SH 47421 69807 (LIDAR) 

Drop:  16.4m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tyn yr Allt (SH 418 653) - 18th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 yr Allt (SH 418 653)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 A4080 road to its north and a minor road to its south, and has the village of Niwbwrch (Newborough) towards the north-east. 

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

When the listing that became known as The Welsh P15s was being compiled, this hill was listed as Bryn Menai which upon greater investigation is in all likelihood a name of a house, with an estimated c 16m of drop, based on an estimated c 54m summit height and an estimated c 38m bwlch height, with each height 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 85 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 yr Allt in the apportionments, with the details on the Tithe map appearing in the parish of Newborough and in the county named as Anglesey. 

Therefore, the name this hill is now listed by in The Welsh P15s is Tyn yr Allt and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tyn yr Allt

Previously Listed Name:  Bryn Menai 

OS 1:50,000 map:  114, 115

Summit Height:  53.6m (LIDAR) 

Summit Grid Reference:  SH 41815 65370 (LIDAR) 

Bwlch Height:  37.6m (LIDAR) 

Bwlch Grid Reference:  SH 42469 66119 (LIDAR) 

Drop:  16.0m (LIDAR) 

 

Myrddyn Phillips (May 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tre Ferwydd (SH 459 703) - 17th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Tre Ferwydd (SH 459 703)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 B4419 road to its immediate north-west and minor roads to its south and east, and has the village of Pentre Berw towards the north-east. 

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

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 60m) notation with an estimated c 18m of drop, based on an estimated c 60m summit height and an estimated c 42m bwlch height, with each height based on interpolation of 5m contouring that appears 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 5 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 Tre Ferwydd in the apportionments, with the details on the Tithe map appearing in the parish of Llangaffo and in the county named as Anglesey. 

Therefore, the name this hill is now listed by in The Welsh P15s is Tre Ferwydd and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tre Ferwydd

Previously Listed Name:  Pt. c 60m 

OS 1:50,000 map:  114, 115

Summit Height:  60.0m (LIDAR)                                                           

Summit Grid Reference:  SH 45975 70381 (LIDAR) 

Bwlch Height:  c 42m (interpolation) 

Bwlch Grid Reference:  SH 46851 70969 (interpolation) 

Drop:  c 18m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (May 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Mawr (SH 468 648) - 16th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Mawr (SH 468 648)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 Menai Strait to its immediate south-east, the B4419 road to its north, the A4080 road to its north-west and a minor road to its west, and has the village of Dwyran towards the west north-west. 

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

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 23m) notation with an estimated c 19m of drop, based on the 23m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 4m bwlch height, based on interpolation of 5m contouring between 0 – 5m. 

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 200 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 Llangeinwen and in the county named as Anglesey. 

Therefore, the name this hill is now listed by in The Welsh P15s 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. 23m 

OS 1:50,000 map:  114, 115

Summit Height:  22.8m (LIDAR)                                                           

Summit Grid Reference:  SH 46849 64813 (LIDAR) 

Bwlch Height:  4.5m (LIDAR) 

Bwlch Grid Reference:  SH 46809 64139 (LIDAR) 

Drop:  18.3m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Foel (SH 473 645) - 15th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Foel (SH 473 645)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 Menai Strait to its immediate south-east, the B4419 road to its north, the A4080 road to its north-west and a minor road to its west, and has the village of Dwyran towards the west north-west. 

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

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 23m) notation with an estimated c 19m of drop, based on the 23m 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 4m bwlch height, based on interpolation of 5m contouring between 0 – 5m that appears 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 201 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 Foel in the apportionments, with the details on the Tithe map appearing in the parish of Llangeinwen and in the county named as Anglesey. 

Therefore, the name this hill is now listed by in The Welsh P15s is Foel and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Foel

Previously Listed Name:  Pt. 23m 

OS 1:50,000 map:  114, 115

Summit Height:  22.9m (LIDAR)                                                           

Summit Grid Reference:  SH 47374 64597 (LIDAR) 

Bwlch Height:  4.4m (LIDAR) 

Bwlch Grid Reference:  SH 47194 65211 (LIDAR) 

Drop:  18.5m (LIDAR) 

 

Myrddyn Phillips (May 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Bonc (SH 539 796) - 14th significant name change

Hill Reclassifications post for Bonc 

There has been a Significant Name Change to a hill that was listed in The Welsh P15s, 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 Bonc (SH 539 796)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 a minor road to its immediate north-west, and has the village of Pentraeth towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. c 32m) notation with an estimated c 14m of drop, based on an estimated c 32m summit height and an estimated c 18m 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 796 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 Bonc in the apportionments, with the details on the Tithe map appearing in the parish of Pentraeth and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by is Bonc and this was derived from the Tithe map.

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Bonc

Previously Listed Name:  Pt. c 32m 

OS 1:50,000 map:  114, 115

Summit Height:  33.5m (LIDAR)                                                           

Summit Grid Reference:  SH 53915 79698 (LIDAR) 

Bwlch Height:  20.85m (LIDAR) 

Bwlch Grid Reference:  SH 53863 79583 & SH 53862 79582 (LIDAR) 

Drop:  12.7m (LIDAR) 

 

Myrddyn Phillips (May 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cryngia (SH 531 778) - 13th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Cryngia (SH 531 778)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 B5109 road to its north and the A5025 road to its south-west, and has the village of Pentraeth towards the north-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 95m) notation with 17m of drop, based on the 95m summit spot height and the 78m 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 323 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 Cryngia in the apportionments, with the details on the Tithe map appearing in the parish of Pentraeth and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Cryngia and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cryngia

Previously Listed Name:  Pt. 95m 

OS 1:50,000 map:  114, 115

Summit Height:  94.3m (LIDAR) 

Summit Grid Reference:  SH 53169 77874 (LIDAR) 

Bwlch Height:  78.4m (LIDAR) 

Bwlch Grid Reference:  SH 53500 78186 & SH 53502 78187 (LIDAR) 

Drop:  15.8m (LIDAR) 

 

Myrddyn Phillips (May 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Rhosydd (SH 245 802) - 12th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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, west and south and the B4545 road to its east, and has the town of Caergybi (Holyhead) towards the north. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 31m) notation with an estimated c 14m 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 17m bwlch height based on interpolation of 5m contouring between 15m – 20m. 

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 1184 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 Rhosydd 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 Welsh P15s is Rhosydd and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Rhosydd

Previously Listed Name:  Pt. 31m 

OS 1:50,000 map:  114

Summit Height:  31m (spot height) 

Summit Grid Reference:  SH 24572 80224 (spot height) 

Bwlch Height:  c 17m (interpolation) 

Bwlch Grid Reference:  SH 24237 80640 (interpolation) 

Drop:  c 14m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (May 2021)

  

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tŷ Dylifws (SH 501 833) - 11th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips and detail on contemporary maps produced from Ordnance Survey data. 

LIDAR image of Tŷ Dylifws (SH 501 833)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 B5110 road to its west and minor roads to its north, south and east, and has the village of Brynteg towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 110m) notation with an estimated c 16m of drop, based on the 110m 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 94m bwlch height based on interpolation of 5m contouring between 90m – 95m. 

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 127 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 Tŷ Dylifws in the apportionments, with the details on the Tithe map appearing in the parish of Llanfair Mathafarn Eithaf and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Tŷ Dylifws and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tŷ Dylifws

Previously Listed Name:  Pt. 110m 

OS 1:50,000 map:  114, 115

Summit Height:  109.3m (LIDAR) 

Summit Grid Reference:  SH 50184 83304 (LIDAR) 

Bwlch Height:  c 94m (interpolation) 

Bwlch Grid Reference:  SH 50035 82841 (interpolation) 

Drop:  c 15m (LIDAR summit and interpolated bwlch) 

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Caer Felin (SH 566 740) - 10th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Caer Felin (SH 566 740)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 A545 road and the coast farther to its south-east, and has the town of Porthaethwy (Menai Bridge) towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed as Llandegfan with an estimated c 14m of drop, based on the 100m 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 86m bwlch height based on interpolation of 5m contouring between 85m – 90m. 

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 62 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 Caer Felin in the apportionments, with the details on the Tithe map appearing in the parish of Llandegfan and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Caer Felin and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Caer Felin

Previously Listed Name:  Llandegfan 

OS 1:50,000 map:  114, 115

Summit Height:  101.4m (LIDAR) 

Summit Grid Reference:  SH 56615 74011 (LIDAR) 

Bwlch Height:  86.8m (LIDAR) 

Bwlch Grid Reference:  SH 57583 74943 (LIDAR) 

Drop:  14.6m (LIDAR) 

 

Myrddyn Phillips (April 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tyn Llwyn (SH 583 810) - 9th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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. 

Tyn Llwyn (SH 583 810)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 a minor road to its immediate north and east, and has the village of Llanddona towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed as Llanddona Transmitting Station with 15m of drop, based on the 148m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 133m bwlch spot height that appears on the Ordnance Survey 1:50,000 Landranger 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 9 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 Llwyn in the apportionments, with the details on the Tithe map appearing in the parish of Llanfihangel Dinsylwy and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Tyn Llwyn and this was derived from the Tithe map, with the land name preferred to that of a name associated with an inanimate object such as a transmitting mast. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tyn Llwyn

Previously Listed Name:  Llanddona Transmitting Station 

OS 1:50,000 map:  114, 115

Summit Height:  148m (spot height) 

Summit Grid Reference:  SH 58334 81024 (spot height) 

Bwlch Height:  133m (spot height) 

Bwlch Grid Reference:  SH 58373 81174 (spot height) 

Drop:  15m (spot height summit and bwlch) 

 

Myrddyn Phillips (April 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Marian Dyrys (SH 597 809) - 8th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 is encircled by minor roads with the B5109 road farther to its south south-east, and has the village of Llanddona towards the south-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 134m) notation with 17m of drop, based on the 134m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 117m 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

Since the initial compilation of this list 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 mapping on the Magic Maps and WalkLakes websites. 

One of the mapping resources now online is the Ordnance Survey series of Six-Inch maps available on the National Library of Scotland website.  This mapping preceded the 1:10,000 base map and has proven an excellent resource for name placement, something that the publicly available Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps cannot proclaim.  And it is the Six-Inch map that places the name of Marian Dyrys adjacent to land taking in this hill and its summit. 

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in The Welsh P15s is Marian Dyrys and this derived from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Marian Dyrys

Previously Listed Name:  Pt. 134m 

OS 1:50,000 map:  114, 115

Summit Height:  134m (spot height) 

Summit Grid Reference:  SH 59715 80960 (spot height) 

Bwlch Height:  117m (spot height) 

Bwlch Grid Reference:  SH 59317 81154 (spot height) 

Drop:  17m (spot height summit and bwlch) 

 

Myrddyn Phillips (April 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tŷ Croes (SH 550 793) - 7th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Tŷ Croes (SH 550 793)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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, minor roads to its west, south-east and north-east and the B5109 road to its south, and has the village of Llanddona towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed by the name of Pentraeth Forest with an estimated c 15m of drop, based on an estimated c 141m summit height and an estimated c 126m 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

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 166 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 Tŷ Croes in the apportionments, with the details on the Tithe map appearing in the parish of Llangoed and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Tŷ Croes and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tŷ Croes

Previously Listed Name:  Pentraeth Forest 

OS 1:50,000 map:  114, 115

Summit Height:  142.0m (LIDAR) 

Summit Grid Reference:  SH 55032 79344 (LIDAR) 

Bwlch Height:  125.8m (LIDAR) 

Bwlch Grid Reference:  SH 54869 79220 (LIDAR) 

Drop:  16.1m (LIDAR) 

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tyddyn Tudor (SH 506 825) - 6th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 west and the B5108 road to its south-east, and has the village of Benllech towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 102m) notation with 15m of drop, based on the 102m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 87m 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 113 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 Tudor in the apportionments, with the details on the Tithe map appearing in the parish of Llanfair Mathafarn Eithaf and in the county named as Anglesey. 

Extract from the apportionments

Therefore, the name this hill is now listed by in The Welsh P15s is Tyddyn Tudor and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Tyddyn Tudor

Previously Listed Name:  Pt. 102m 

OS 1:50,000 map:  114, 115

Summit Height:  102m (spot height) 

Summit Grid Reference:  SH 50620 82580 (spot height) 

Bwlch Height:  87m (spot height) 

Bwlch Grid Reference:  SH 50435 82415 (spot height) 

Drop:  15m (spot height summit and bwlch) 

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Parciau (SH 491 845) - 5th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Parciau (SH 491 845)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 A5025 road to its north, a minor road to its south and the B5110 road to its south-east, and has the village of Benllech towards the south-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 107m) notation with 14m of drop, based on the 107m summit spot height and the 93m 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 15 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 Parciau in the apportionments, with the details on the Tithe map appearing in the parish of Llaneugrad and in the county named as Anglesey. 

Extract from the apportionments

Since the initial compilation of this list 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 mapping on the Magic Maps and WalkLakes websites. 

One of the mapping resources now online is the Ordnance Survey series of Six-Inch maps available on the National Library of Scotland website.  This mapping preceded the 1:10,000 base map and has proven an excellent resource for name placement, something that the publicly available Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps cannot proclaim.  And it is the Six-Inch map that places the name of Parciau adjacent to this hill’s summit. 

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in The Welsh P15s is Parciau and this was derived from the Tithe map and substantiated from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Parciau

Previously Listed Name:  Pt. 107m 

OS 1:50,000 map:  114, 115

Summit Height:  108.1m (LIDAR) 

Summit Grid Reference:  SH 49187 84550 (LIDAR) 

Bwlch Height:  93.6m (LIDAR) 

Bwlch Grid Reference:  SH 49266 84361 (LIDAR) 

Drop:  14.5m (LIDAR) 

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Mynydd Cerrig y Bleiddiau (SH 445 902) - 4th significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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 Mynydd Cerrig y Bleiddiau (SH 445 902)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 B5111 road to its north-west and the A5025 road to its east, and has the village of Pen-y-sarn towards the east. 

When the original 100m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website this hill was included in the Hills to be surveyed sub list, with an accompanying note stating; Name from hill to the North-West.

Parys Mountain South-East top

131m

SH445903

114

263

Name from hill 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 use a directional name based on supplanting the name of a near hill and adding a directional component to it.  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 179 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 Cerrig y Bleiddiau 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 Welsh P15s is Mynydd Cerrig y Bleiddiau, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Mynydd Cerrig y Bleiddiau

Previously Listed Name:  Parys Mountain South-East top 

OS 1:50,000 map:  114

Summit Height:  131.1m (LIDAR) 

Summit Grid Reference:  SH 44539 90284 (LIDAR) 

Bwlch Height:  113.1m (LIDAR) 

Bwlch Grid Reference:  SH 44495 90291 (LIDAR) 

Drop:  18.0m (LIDAR) 

 

Myrddyn Phillips (April 2021)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Foel Newydd (SH 434 902) - 3rd significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill derived from by LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Foel Newydd (SH 434 902)

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

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 and west and the B5111 road to its immediate south-east, and has the village of Pen-y-sarn towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 133m) notation with an estimated c 15m of drop, based on the 133m 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 an estimated c 118m bwlch height based on interpolation of 5m contouring between 115m – 120m. 

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

Since the initial compilation of this list 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 mapping on the Magic Maps and WalkLakes websites. 

One of the mapping resources now online is the Ordnance Survey series of Six-Inch maps available on the National Library of Scotland website.  This mapping preceded the 1:10,000 base map and has proven an excellent resource for name placement, something that the publicly available Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps cannot proclaim.  And it is the Six-Inch map that places the name of Foel Newydd adjacent to this hill’s summit. 

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in The Welsh P15s is Foel Newydd, and this was derived from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Foel Newydd

Previously Listed Name:  Pt. 133m 

OS 1:50,000 map:  114

Summit Height:  134.3m (LIDAR) 

Summit Grid Reference:  SH 43422 90238 (LIDAR) 

Bwlch Height:  117.4m (LIDAR) 

Bwlch Grid Reference:  SH 43703 90281 (LIDAR) 

Drop:  17.0m (LIDAR) 

 

Myrddyn Phillips (April 2021)

 

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Mynydd Twr (SH 207 824) - 2nd significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 overlooking the coast to its north and west and has minor roads to its south and east, and has the town of Caergybi (Holyhead) towards the east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 142m) notation with an estimated c 19m of drop, based on the 142m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 123m bwlch height based on interpolation of 5m contouring between 120m – 125m. 

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 537 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.  However, the Tithe map can also be used to substantiate land boundaries and this map names this land as a part of the larger Mynydd Twr. 

Therefore, the name this hill is now listed by in The Welsh P15s is Mynydd Twr, and this was derived from the hill being a part of the land of the larger mountain known as Mynydd Twr, with the land boundary substantiated by the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Mynydd Twr

Previously Listed Name:  Pt. 142m 

OS 1:50,000 map:  114

Summit Height:  142m (spot height) 

Summit Grid Reference:  SH 20748 82447 (spot height) 

Bwlch Height:  c 123m (interpolation) 

Bwlch Grid Reference:  SH 20906 82363 (interpolation) 

Drop:  c 19m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (April 2021)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Mynydd Twr (SH 217 833) - 1st significant name change

 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, 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:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s 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 overlooking the coast to its north and west and has minor roads to its south-east, and has the town of Caergybi (Holyhead) towards the east south-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed under the point (Pt. 179m) notation with an estimated c 17m of drop, based on the 179m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 162m bwlch height based on interpolation of 5m contouring between 160m – 165m. 

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 537 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.  However, the Tithe map can also be used to substantiate land boundaries and this map names this land as a part of the larger Mynydd Twr. 

Therefore, the name this hill is now listed by in The Welsh P15s is Mynydd Twr, and this was derived from the hill being a part of the land of the larger mountain known as Mynydd Twr, with the land boundary substantiated by the Tithe map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Mynydd Twr

Previously Listed Name:  Pt. 179m 

OS 1:50,000 map:  114

Summit Height:  179m (spot height) 

Summit Grid Reference:  SH 21734 83347 (spot height) 

Bwlch Height:  c 162m (interpolation) 

Bwlch Grid Reference:  SH 21815 83211 (interpolation) 

Drop:  c 17m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (April 2021)