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

Penrhyn Dyfi (SH 742 022) - 140th 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 Penrhyn Dyfi (SH 742 022)

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 Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its south-west and the A493 road to its south, and has the town of Machynlleth towards the south south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 168m) notation with an estimated c 15m of drop, based on the 168m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 153m bwlch height, based on interpolation of 10m contouring between 150m – 160m. 

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 401 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 a part of Penrhyn Dyfi in the apportionments, with the details on the Tithe map appearing in the parish named as Pennal and in the county named as Merioneth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Penrhyn Dyfi 

Previously Listed Name:  Pt. 168m 

OS 1:50,000 map:  135

Summit Height:  167.5m (LIDAR)                                                           

Summit Grid Reference:  SH 74205 02249 (LIDAR)                                                  

Bwlch Height:  150.3m (LIDAR) 

Bwlch Grid Reference:  SH 74182 02510 (LIDAR) 

Drop:  17.2m (LIDAR) 

 

Myrddyn Phillips (May 2025)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Penrhyn Dyfi (SH 739 021) - 139th 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 Penrhyn Dyfi (SH 739 021)

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 Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its south and the A493 road to its south-east, and has the town of Machynlleth towards the south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 165m) notation with an estimated c 16m of drop, based on the 165m 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 149m bwlch height, based on interpolation of 10m contouring between 140m – 150m. 

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 404 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 a part of Penrhyn Dyfi in the apportionments, with the details on the Tithe map appearing in the parish named as Pennal and in the county named as Merioneth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Penrhyn Dyfi 

Previously Listed Name:  Pt. 165m 

OS 1:50,000 map:  135

Summit Height:  165.2m (LIDAR)                                                           

Summit Grid Reference:  SH 73913 02181 (LIDAR)                                                  

Bwlch Height:  148.0m (LIDAR) 

Bwlch Grid Reference:  SH 74094 02479 & SH 74095 02483 (LIDAR) 

Drop:  17.2m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae’r Coed (SH 718 002) - 138th significant name change

Hill Reclassifications post for Cae'r Coed

 

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'r Coed (SH 718 002)

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 Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with the A493 road to its north and the A487 road to its south, and has the town of Machynlleth towards the east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 103m) notation with an estimated c 15m of drop, based on the 103m 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 88m bwlch height, based on interpolation of 10m contouring between 80m – 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 507 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated is named as Cae’r Coed in the apportionments, with the details on the Tithe map appearing in the parish named as Pennal and in the county named as Merioneth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Cae’r Coed 

Previously Listed Name:  Pt. 103m 

OS 1:50,000 map:  135

Summit Height:  102.6m (LIDAR)                                                           

Summit Grid Reference:  SH 71846 00220 (LIDAR)                                                  

Bwlch Height:  87.7m (LIDAR) 

Bwlch Grid Reference:  SH 71932 00341 (LIDAR) 

Drop:  14.9m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Ffridd (SH 727 005) - 137th significant name change

Hill Reclassifications post for Ffridd

 

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 Ffridd (SH 727 005)

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 Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with the A493 road to its north and the A487 road to its south-east, and has the town of Machynlleth towards the east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the accompanying sub list under the point (Pt. 107m) notation with an estimated c 14m of drop, based on the 107m 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 93m bwlch height, based on interpolation of 10m contouring between 90m – 100m. 

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 450 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 Ffridd in the apportionments, with the details on the Tithe map appearing in the parish named as Pennal and in the county named as Merioneth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Ffridd 

Previously Listed Name:  Pt. 107m 

OS 1:50,000 map:  135

Summit Height:  108.0m (LIDAR)                                                           

Summit Grid Reference:  SH 72710 00582 (LIDAR)                                                  

Bwlch Height:  90.1m (LIDAR) 

Bwlch Grid Reference:  SH 72437 00590 (LIDAR) 

Drop:  18.0m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Bryn yr Arad (SN 722 998) - 136th 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 Bryn yr Arad (SN 722 998)

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 Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with the A493 road to its north and the A487 road to its south, and has the town of Machynlleth towards the east north-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 65m) notation with an estimated c 17 of drop, based on the 65m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Mp, and an estimated c 48m bwlch height, based on interpolation of 10m contouring between 40m – 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 526 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 Bryn yr Arad (transcribed as Bryn i arad) in the apportionments, with the details on the Tithe map appearing in the parish named as Pennal and in the county named as Merioneth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Bryn yr Arad 

Previously Listed Name:  Pt. 65m 

OS 1:50,000 map:  135

Summit Height:  65.0m (LIDAR) 

Summit Grid Reference:  SN 72268 99832 (LIDAR) 

Bwlch Height:  46.5m (LIDAR) 

Bwlch Grid Reference:  SN 72263 99951 & SN 72264 99951 (LIDAR) 

Drop:  18.5m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Creigiau Cochion (SN 611 989) - 135th 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 Creigiau Cochion (SN 611 989)

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 Tarren y Gesail group of hills, which are situated in the south-western part of North Wales (Region A, Sub-Region A3), and it is positioned with a minor road to its north and the A493 road to its west and south, and has the town of Tywyn towards the north-west.

When the original 100m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-assessed and it was listed under the point (Pt. 168m) notation with an estimated c 20m of drop (subsequent LIDAR analysis gives this hill 19.98m of drop), based on the 168m 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 148m bwlch height, based on interpolation of 10m contouring between 140m – 150m. 

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 1030 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 Creigiau Cochion in the apportionments, with the details on the Tithe map appearing in the parish named as Tywyn and in the county named as Merioneth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Creigiau Cochion 

Previously Listed Name:  Pt. 168m 

OS 1:50,000 map:  135

Summit Height:  168.3m (LIDAR) 

Summit Grid Reference:  SN 61176 98937 (LIDAR) 

Bwlch Height:  148.3m (LIDAR) 

Bwlch Grid Reference:  SN 61236 98904 (LIDAR) 

Drop:  19.98m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Y Lan Cwm Gwilym Fach (SO 070 364) - 134th significant name change

Summit Relocations post for Y Lan Cwm Gwilym Fach

 

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 Y Lan Cwm Gwilym Fach (SO 070 364)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned encircled by minor roads with the B4520 road farther to its west and the A470 road farther to its north-east and south-east, and has the small community of Capel Uchaf (Upper Chapel) towards the north-west.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 367m) notation with an estimated c 14 of drop, based on the 367m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map, and an estimated c 353m bwlch height, based on interpolation of 10m contouring between 350m – 360m. 

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 1110 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 Y Lan (of the farm) Cwm Gwilym Fach in the apportionments, with the details on the Tithe map appearing in the parish named as Gwenddwr and in the county named as Brecon. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the The Welsh P15s is Y Lan Cwm Gwilym Fach, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Y Lan Cwm Gwilym Fach 

Previously Listed Name:  Pt. 367m 

OS 1:50,000 map:  160

Summit Height:  367.4m (LIDAR)                                                           

Summit Grid Reference:  SO 07042 36407 (LIDAR) 

Bwlch Height:  352.8m (LIDAR) 

Bwlch Grid Reference:  SO 07321 36626 (LIDAR) 

Drop:  14.6m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Mynydd Llandyfalle (SO 075 369) - 133rd 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 Llandyfalle (SO 075 369)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned encircled by minor roads with the B4520 road farther to its west and the A470 road farther to its north-east and south-east, and has the small community of Capel Uchaf (Upper Chapel) towards the north-west.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the transposed name of Llandyfalle Hill, which is a prominent name that appears near the summit of the hill on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map. 

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

Since the original compilation of this list there have been a number of 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 were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.  One of the historic maps now available online is the Ordnance Survey Draft Surveyors map which formed the basis for the first publicly available Ordnance Survey One-Inch ‘Old Series’ map, and it is the Draft Surveyors map and the prioritised language protocol that has prompted the change in the listed name of this hill.

The Draft Surveyors maps consist of the preliminary drawings made by the Ordnance Survey surveyors between the 1780s and 1840 and formed the basis for the first publicly available One-Inch map.  They were drawn at scales of six inches to the mile for areas considered of particular military significance and down to two inches to the mile for other areas.  Fair copies were then produced from these preliminary drawings to one inch to the mile and then copper plates were prepared for printing.  The Draft Surveyors maps for the whole of Wales are now available online and they form an important part in the study of Welsh upland place-names as they bridge the time frame between the late 18^th century and the mid-19^th century when the Ordnance Survey produced their first One-Inch maps, and importantly for this hill and its listed name, it is this map that uses the name of Mynydd Llandyfalle for the land taking in the summit of this hill. 

Extract from the Ordnance Survey Draft Surveyors Map

The intricacies of language and prioritising one in favour of another for listing a hill is fraught with complication, with originating Cymraeg names being anglicised and also originating English names being cymricised, examples such as these are more common in border country and especially so for anglicised forms.  There is no steadfast rule that fits all, but as a standard a name that has its origins in the Welsh language and where this is substantiated by either historic documentation and/or contemporary usage should be prioritised in favour of a contemporary anglicised or English version of the name.  Likewise, if a name exists where an element of it is in English and if this name applies to a hill that is situated in a Welsh speaking part of Wales it is standard practice to use a full Welsh term for the name.  It is also standard practice to use a Welsh name for a hill if another name exists that has originated in a different language.

Therefore, the name this hill is now listed by in the The Welsh P15s is Mynydd Llandyfalle, and this was derived from the Ordnance Survey Draft Surveyors Map with the language protocol also being used. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Mynydd Llandyfalle 

Previously Listed Name:  Llandyfalle Hill 

OS 1:50,000 map:  160

Summit Height:  377.0m (LIDAR)                                                           

Summit Grid Reference:  SO 07556 36973 (LIDAR) 

Bwlch Height:  361.7m (LIDAR) 

Bwlch Grid Reference:  SO 07117 37107 & SO 07106 37103 (LIDAR) 

Drop:  15.3m (LIDAR) 

 

Myrddyn Phillips (May 2025)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Ten Covers (ST 317 999) - 132nd significant name change 

Hill Reclassifications post for Ten Covers

 

There has been a Significant Name Change to a hill that used to be listed in the 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 Ten Covers (ST 317 999)

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 Cefn yr Ystrad group of hills, which are situated in the southern part of South Wales (Region B, Sub-Region B5), and it is positioned encircled by minor roads, with the A4042 farther road to its west, and has the town of Pont-y-pŵl (Pontypool) towards the west north-west.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. c 118m) notation with an estimated c 15m of drop, based on an estimated c 118m summit height and an estimated c 103m bwlch height, with both heights based on interpolation of 5m contouring. 

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 79 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 Ten Covers in the apportionments, with the details on the Tithe map appearing in the parish named as Usk and in the county named as Monmouth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Cefn yr Ystrad 

Name:  Ten Covers 

Previously Listed Name:  Pt. c 118m 

OS 1:50,000 map:  171

Summit Height:  116.5m (LIDAR)                                                           

Summit Grid Reference:  ST 31791 99957 (LIDAR)                                                  

Bwlch Height:  104.9m (LIDAR) 

Bwlch Grid Reference:  SO 31583 00118 (LIDAR) 

Drop:  11.6m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Duon (SJ 075 090) - 131st significant name change

Summit Relocations post for Cae Duon

 

There has been a Significant Name Change to a hill that is listed in the 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 Duon (SJ 075 090)

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 Carnedd Wen group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north-west and east, with the A458 road to its south-west, and has the town of Llanfair Caereinion towards the south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 168m) notation with an estimated c 15m of drop, based on the 168m summit spot height positioned on a road at SJ 07581 09015 that appears on the Ordnance Survey 1:25,000 Explorer map, and an estimated c 153m bwlch height, based on interpolation of 5m contouring between 150m – 155m. 

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 2596 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 Duon in the apportionments, with the details on the Tithe map appearing in the parish named as Llanfair and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Carnedd Wen 

Name:  Cae Duon 

Previously Listed Name:  Pt. 168m 

OS 1:50,000 map:  125

Summit Height:  167.2m (LIDAR)                                                           

Summit Grid Reference:  SJ 07592 09025 (LIDAR)                                                  

Bwlch Height:  150.9m (LIDAR) 

Bwlch Grid Reference:  SJ 07395 09423 (LIDAR) 

Drop:  16.25m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Ffridd Mathrafal (SJ 114 102) - 130th significant name change

Hill Reclassifications post for Ffridd Mathrafal

Significant Height Revisions post for Ffridd Mathrafal

 

There has been confirmation of a Significant Name Change to a hill that is listed in the 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 Ffridd Mathrafal (SJ 114 102)

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 Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with the A495 road to its immediate south, and has the town of Llanfair Caereinion towards the south south-west.

When the listing that became known as The Welsh P15s was being compiled, this hill was not included in the main P15 or Sub P14 list, as with an uppermost 140m ring contour and bwlch contouring between 130m – 140m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, it was deemed not to have sufficient prominence to be listed. 

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

One of the mapping resources now available online is the WalkLakes website which hosts an interactive map originated from the Ordnance Survey Open Data programme.  This map has many spot heights not on other publicly available maps and for this hill a 148m summit spot height is given, with subsequent interpolation giving the hill an estimated c 13m of drop and being listed under the point (Pt. 148m) notation.

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 829 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 Ffridd Mathrafal in the apportionments, with the details on the Tithe map appearing in the parish named as Llangynyw and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Ffridd Mathrafal 

Previously Listed Name:  Pt. 148m 

OS 1:50,000 map:  125

Summit Height:  150.0m (LIDAR)                                                           

Summit Grid Reference:  SJ 11408 10233 (LIDAR)                                                  

Bwlch Height:  132.8m (LIDAR) 

Bwlch Grid Reference:  SJ 11315 10265 (LIDAR) 

Drop:  17.2m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Erw Fawr (SJ 101 111) - 129th significant name change

 

There has been a Significant Name Change to a hill that is listed in the 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 Erw Fawr (SJ 101 111)

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 Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and east, with the B4382 road to its south-west and the A495 road farther to its south-east, and has the town of Llanfair Caereinion towards the south.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 196m) notation with an estimated c 17m of drop, based on the 196m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 179m bwlch height, based on interpolation of 10m contouring between 170m – 180m. 

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 546 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 Erw Fawr in the apportionments, with the details on the Tithe map appearing in the parish named as Llangynyw and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Erw Fawr 

Previously Listed Name:  Pt. 196m 

OS 1:50,000 map:  125

Summit Height:  195.2m (LIDAR)                                                           

Summit Grid Reference:  SJ 10101 11120 & SJ 10103 11121 (LIDAR)                                                  

Bwlch Height:  180.2m (LIDAR) 

Bwlch Grid Reference:  SJ 10301 11306 (LIDAR) 

Drop:  15.0m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tŷ Boeth (SJ 107 111) - 128th significant name change

Hill Reclassifications post for Tŷ Boeth

 

There has been a Significant Name Change to a hill that is listed in the 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 Boeth (SJ 107 111)

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 Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and west, with the B4382 road and the A495 road to its south, and has the town of Llanfair Caereinion towards the south.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 193m) notation with 15m of drop, based on the 193m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map, and the 178m 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 453 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 a part of Tŷ Boeth in the apportionments, with the details on the Tithe map appearing in the parish named as Llangynyw and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Tŷ Boeth 

Previously Listed Name:  Pt. 193m 

OS 1:50,000 map:  125

Summit Height:  193.5m (LIDAR)                                                           

Summit Grid Reference:  SJ 10787 11179 (LIDAR)                                                  

Bwlch Height:  178.9m (LIDAR) 

Bwlch Grid Reference:  SJ 10981 11189 (LIDAR) 

Drop:  14.6m (LIDAR) 

 

Myrddyn Phillips (May 2025) 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Tan House Ucha (SJ 106 106) - 127th significant name change

 

There has been a Significant Name Change to a hill that is listed in the 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 Tan House Ucha (SJ 106 106)

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 Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north and west, the B4382 road and the A495 road to its south, and has the town of Llanfair Caereinion towards the south.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 192m) notation with 15m of drop, based on the 192m summit spot height that apperas on the Ordnance Survey 1:25,000 Explorer map and the 177m 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 721 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 a part of Tan House Ucha in the apportionments, with the details on the Tithe map appearing in the parish named as Llangynyw and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Tan House Ucha 

Previously Listed Name:  Pt. 192m 

OS 1:50,000 map:  125

Summit Height:  193.0m (LIDAR)                                                           

Summit Grid Reference:  SJ 10676 10620 (LIDAR)                                                  

Bwlch Height:  177.3m (LIDAR) 

Bwlch Grid Reference:  SJ 10853 10729 (LIDAR) 

Drop:  15.7m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Llidiart Fawr (SJ 085 095) - 126th significant name change

Summit Relocations post for Cae Llidiart Fawr

 

There has been a Significant Name Change to a hill that is listed in the 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 Llidiart Fawr (SJ 085 095)

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 Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its north, west and east, with the A458 road and the A495 road to its south, and has the town of Llanfair Caereinion towards the south south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. c 191m) notation with an estimated c 17m of drop, based on an estimated c 191m summit height positioned at SJ 08517 09520 and an estimated c 174m bwlch height, with both heights based on interpolation of 5m contouring. 

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 1820 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 Llidiart Fawr in the apportionments, with the details on the Tithe map appearing in the parish named as Llanfair and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Cae Llidiart Fawr 

Previously Listed Name:  Pt. c 191m 

OS 1:50,000 map:  125

Summit Height:  190.1m (LIDAR)                                                           

Summit Grid Reference:  SJ 08505 09512 (LIDAR)                                                  

Bwlch Height:  173.8m (LIDAR) 

Bwlch Grid Reference:  SJ 08871 09602 (LIDAR) 

Drop:  16.3m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Tŷ (SJ 077 107) - 125th significant name change

Hill Reclassifications post for Cae Tŷ

Summit Relocations post for Cae Tŷ

 

There has been a Significant Name Change to a hill that used to be listed in the 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 Tŷ (SJ 077 107)

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 Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned encircled by minor roads, with the B4382 road farther to its north-east, the A458 road farther to its south-west and the A495 road farther to its south-east and has the town of Llanfair Caereinion towards the south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the P14 sub list under the point (Pt. 208m) notation with an estimated c 14m of drop, based on the 208m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and an estimated c 194m bwlch height, based on interpolation of 10m contouring between 190m – 200m. 

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 2015 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 Tŷ in the apportionments, with the details on the Tithe map appearing in the parish named as Llanfair and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Cae Tŷ 

Previously Listed Name:  Pt. 208m 

OS 1:50,000 map:  125

Summit Height:  208.5m (LIDAR)                                                           

Summit Grid Reference:  SJ 07741 10751 (LIDAR)                                                  

Bwlch Height:  196.7m (LIDAR) 

Bwlch Grid Reference:  SJ 07212 10935 (LIDAR) 

Drop:  11.8m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

New Field (SJ 078 114) - 124th significant name change

Summit Relocations post for New Field

 

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 New Field (SJ 078 114)

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 Esgeiriau Gwynion group of hills, which are situated in the southern part of North Wales (Region A, Sub-Region A3), and it is positioned encircled by minor roads, with the B4382 road farther to its north-east, the A458 road farther to its south-west and the A495 road farther to its south-east, and has the town of Llanfair Caereinion towards the south south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 210m) notation with 19m of drop, based on the 210m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and the 191m 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 2119 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 New Field in the apportionments, with the details on the Tithe map appearing in the parish named as Llanfair and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  New Field 

Previously Listed Name:  Pt. 210m 

OS 1:50,000 map:  125

Summit Height:  210.55m (LIDAR)                                                           

Summit Grid Reference:  SJ 07868 11468 (LIDAR)                                                  

Bwlch Height:  190.9m (LIDAR) 

Bwlch Grid Reference:  SJ 07603 11417 (LIDAR) 

Drop:  19.6m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Llan Ucha Castell Madog (SO 027 385) - 123rd significant name change

Significant Height Revisions post for Llan Ucha Castell Madog

 

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 Llan Ucha Castell Madog (SO 027 385)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with the B4520 road to its west and a minor road to its east, and has the small community of Capel Uchaf (Upper Chapel) towards the north-west.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the accompanying Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (P. 399m) notation with an estimated c 21m of drop, based on the 399m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website which was entitled the Interactive Coverage Map and an estimated c 378m bwlch height, based on interpolation of 10m contouring between 370m – 380m. 

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 790a 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 Llan Ucha (of the farm) Castell Madog in the apportionments, with the details on the Tithe map appearing in the parish named as Llandylaelog Fach and in the county named as Brecon. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Llan Ucha Castell Madog 

Previously Listed Name:  Pt. 399m 

OS 1:50,000 map:  160

Summit Height:  400.7m (LIDAR)                                                           

Summit Grid Reference:  SO 02707 38531 (LIDAR) 

Bwlch Height:  381.6m (LIDAR) 

Bwlch Grid Reference:  SO 02779 38800 & SO 02780 38801 (LIDAR) 

Drop:  19.1m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Lan Ffynnon Las & Disgwylfa (SN 998 433) - 122nd significant name change

Summit Relocations post for Lan Ffynnon Las & Disgwylfa

 

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 Lan Ffynnon Las & Disgwylfa (SN 998 433)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with the B4519 road to its west and the B4520 road to its east, and has the hamlet of Capel Uchaf (Upper Chapel) towards the south south-east.

When the original 300m height band of Welsh P30 hills was published on Geoff Crowder’s v-g.me website, this hill was not included in the Hills to be surveyed sub list that accompanied the main P30 list, as it was considered not to meet the criteria then used for this sub category.

After the P30 lists were standardised, and interpolated heights and drop values also included, this hill was listed under the point (Pt. 393m) notation, with an estimated c 20m of drop (with subsequent LIDAR analysis giving it 19.98m of drop) based on the 393m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 373m bwlch height based on interpolation of 10m contouring between 370m – 380m. 

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 2054 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 Lan (of the farm) Ffynnon Las & Disgwylfa in the apportionments, with the details on the Tithe map appearing in the parish named as Merthyr Cynog and in the county named as Brecon. 

Extract from the apportionments

Therefore, the name this hill is now listed by in the The Welsh P15s is Lan Ffynnon Las & Disgwylfa, and this was derived from the Tithe map. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Lan Ffynnon Las & Disgwylfa 

Previously Listed Name:  Pt. 393m 

OS 1:50,000 map:  147, 160

Summit Height:  392.0m (LIDAR)                                                           

Summit Grid Reference:  SN 99802 43305 (LIDAR)                                                  

Bwlch Height:  372.0m (LIDAR) 

Bwlch Grid Reference:  SO 00000 43778 (LIDAR) 

Drop:  19.98m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Croft (SJ 110 159) - 121st 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 Croft (SJ 110 159)

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 Foel Cedig group of hills, which are situated in the central part of North Wales (Region A, Sub-Region A3), and it is positioned with minor roads to its west, south and east, with the B4393 road to its north, and has the town of Llanfyllin towards the north-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 284m) notation with 17m of drop, based on the 284m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map, and the 267m 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 463 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 Croft in the apportionments, with the details on the Tithe map appearing in the parish named as Llanfihangel and in the county named as Montgomery. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Foel Cedig 

Name:  Croft

Previously Listed Name:  Pt. 284m 

OS 1:50,000 map:  125

Summit Height:  284.3m (LIDAR)                                                           

Summit Grid Reference:  SJ 11077 15934 (LIDAR) 

Bwlch Height:  267.0m (LIDAR) 

Bwlch Grid Reference:  SJ 11471 16044 & S 11472 16042 (LIDAR) 

Drop:  17.3m (LIDAR) 

 

Myrddyn Phillips (May 2025) 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Mynydd Aberysgir (SN 985 312) - 120th significant name change

Summit Relocations post for Mynydd Aberysgir

 

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 Aberysgir (SN 985 312)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned encircled by minor roads with the A40 road farther to its south, and has the town of Aberhonddu (Brecon) towards the east south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 341m) notation with an estimated c 18m of drop, based on the 341m twin summit spot heights positioned at SN 98586 31211 and SN 98676 31149, with the latter appearing on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and an estimated c 323m bwlch height based on interpolation of 10m contouring between 320m – 330m. 

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 20 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 Aberysgir Common (latterly Mynydd Aberysgir) in the apportionments, with the details on the Tithe map appearing in the parish named as Aberysgir and in the county named as Brecon. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Mynydd Aberysgir

Previously Listed Name:  Pt. 341m 

OS 1:50,000 map:  160

Summit Height:  341.1m (LIDAR)                                                           

Summit Grid Reference:  SN 98578 31205 (LIDAR) 

Bwlch Height:  321.4m (LIDAR) 

Bwlch Grid Reference:  SN 98385 31519 & SN 98384 31522 (LIDAR) 

Drop:  19.7m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Mynydd Trallwng (SN 965 311) - 119th 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 Trallwng (SN 965 311)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with minor roads to its north-east and south, and the A40 road farther to its south, and has the village of Pontsenni (Sennybridge) towards the west south-west.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed under the point (Pt. 377m) notation with 2om of drop (therefore listed as a Sub-Trichant with subsequent LIDAR analysis giving it 19.6m of drop), based on the 377m summit spot height that appears on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and the 357m 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 original publication of the Welsh P30 lists on Geoff Crowder’s v-g.me website there have been a number of 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 were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.  One of the historic maps now available online is the Ordnance Survey Draft Surveyors map which formed the basis for the first publicly available Ordnance Survey One-Inch ‘Old Series’ map, and it is the Draft Surveyors map that has prompted the change in the listed name of this hill. 

Extract from the Ordnance Survey Draft Surveyors Map

The Draft Surveyors maps consist of the preliminary drawings made by the Ordnance Survey surveyors between the 1780s and 1840 and formed the basis for the first publicly available One-Inch map.  They were drawn at scales of six inches to the mile for areas considered of particular military significance and down to two inches to the mile for other areas.  Fair copies were then produced from these preliminary drawings to one inch to the mile and then copper plates were prepared for printing.  The Draft Surveyors maps for the whole of Wales are now available online and they form an important part in the study of Welsh upland place-names as they bridge the time frame between the late 18^th century and the mid-19^th century when the Ordnance Survey produced their first One-Inch maps, and importantly for this hill and its listed name, it is this map that places the name Mynydd Trallwng adjacent to the summit of this hill.

Therefore, the name this hill is now listed by in the The Welsh P15s is Mynydd Trallwng, and this was derived from the Ordnance Survey Draft Surveyors Map. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Mynydd Trallwng

Previously Listed Name:  Pt. 377m 

OS 1:50,000 map:  160

Summit Height:  376.9m (LIDAR)                                                           

Summit Grid Reference:  SN 96522 31151 (LIDAR) 

Bwlch Height:  357.3m (LIDAR) 

Bwlch Grid Reference:  SN 96272 31300 & SN 96275 31303 (LIDAR) 

Drop:  19.6m (LIDAR) 

 

Myrddyn Phillips (May 2025) 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Trelath (SN 875 395) - 118th 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 Trelath (SN 875 395)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with minor roads to its north and south-east, and the A483 road to its west, and has the town of Llanwrtyd towards the north.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 338m) notation with 17m of drop, based on the 338m summit spot height and the 321m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

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

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

Extract from the Tithe map

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

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Trelath

Previously Listed Name:  Pt. 338m 

OS 1:50,000 map:  160

Summit Height:  338.4m (LIDAR)                                                           

Summit Grid Reference:  SN 87541 39590 (LIDAR)                                                  

Bwlch Height:  319.9m (LIDAR) 

Bwlch Grid Reference:  SN 87172 39134 (LIDAR) 

Drop:  18.5m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Ucha Dan y Lan (SN 863 389) - 117th 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 Ucha Dan y Lan (SN 863 389)

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 Mynydd Epynt group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with minor roads to its north-west and south-west, and the A483 road to its west, and has the town of Llanwrtyd towards the north.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. c 344m) notation, with an estimated c 18m of drop, based on an estimated c 344m summit height and an estimated c 326m bwlch height, with both heights based on interpolation of 10m 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 2284 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 Ucha Dan y Lan in the apportionments, with the details on the Tithe map appearing in the parish named as Llanfair-ar-y-bryn and in the county named as Carmarthenshire. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Cae Ucha Dan y Lan

Previously Listed Name:  Pt. c 344m 

OS 1:50,000 map:  160

Summit Height:  342.3m (LIDAR)                                                           

Summit Grid Reference:  SN 86321 38958 (LIDAR)                                                  

Bwlch Height:  326.5m (LIDAR) 

Bwlch Grid Reference:  SN 86287 39064 (LIDAR) 

Drop:  15.8m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Graig Pen y Bont (SN 349 055) - 116th significant name change

Hill Reclassifications post for Graig Pen y Bont

Significant Height Revisions post for Graig Pen y Bont

 

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 Graig Pen y Bont (SO 349 055)

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 Ysgyryd Fawr group of hills, which are situated in the south-eastern part of South Wales (Region B, Sub-Region B4), and it is positioned with minor roads to its north and east, and the B4598 road to its west, and has the town of Brynbuga (Usk) towards the south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was not included as with an uppermost 60m contour and bwlch contouring between 50m – 60m that appear on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, it was judged not to meet the criterion for the main P15 or the accompanying P14 sub list, with subsequent interpolation giving it an estimated c 68m summit height and being listed under the point (Pt. c 68m) notation. 

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

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

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 134 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 Graig Pen y Bont in the apportionments, with the details on the Tithe map appearing in the parish named as Cemais Comawndwr and in the county named as Monmouth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Ysgyryd Fawr 

Name:  Graig Pen y Bont

Previously Listed Name:  Pt. c 68m 

OS 1:50,000 map:  161

Summit Height:  70.3m (LIDAR)                                                           

Summit Grid Reference:  SO 34901 05538 (LIDAR)                                                  

Bwlch Height:  55.9m (LIDAR) 

Bwlch Grid Reference:  SO 34994 05530 (LIDAR) 

Drop:  14.4m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Upper Field (SN 354 059) - 115th significant name change

Hill Reclassifications post for Upper Field

 

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 Upper Field (SO 354 059)

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 Ysgyryd Fawr group of hills, which are situated in the south-eastern part of South Wales (Region B, Sub-Region B4), and it is positioned with a minor road to its immediate south and the B4598 road to its west, and has the town of Brynbuga (Usk) towards the south south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the P14 sub list under the point (Pt. c 106m) notation with an estimated c 14m of drop, based on an estimated c 106m summit height based on interpolation of the uppermost 105m ring contour, and the 92m bwlch spot height, with both appearing 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 47 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 Upper Field in the apportionments, with the details on the Tithe map appearing in the parish named as Betws Newydd and in the county named as Monmouth. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Ysgyryd Fawr 

Name:  Upper Field

Previously Listed Name:  Pt. c 106m 

OS 1:50,000 map:  161

Summit Height:  105.4m (LIDAR)                                                           

Summit Grid Reference:  SO 35492 05982 (LIDAR)                                                  

Bwlch Height:  93.7m (LIDAR) 

Bwlch Grid Reference:  SO 35620 05997 & SO 35621 05995 (LIDAR) 

Drop:  11.65m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Coed y Ringoed (SO 359 051) - 114th significant name change

Summit Relocations post for Coed y Ringoed

 

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 Coed y Ringoed (SO 359 051)

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 Ysgyryd Fawr group of hills, which are situated in the south-eastern part of South Wales (Region B, Sub-Region B4), and it is positioned with minor roadr to its north-west and east, and the B4598 road to its south-west, and has the town of Brynbuga (Usk) towards the south south-east.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 101m) notation with an estimated c 15m of drop, based on the 101m summit spot height positioned at SO 36022 05237 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

When the details for this hill were first listed they were taken from the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, with the 101m spot height positioned at SO 36022 05237.  As this position is not part of the wood named as Coed y Ringoed, the point notation was used for the listed name of this hill.  However, due to LIDAR analysis the summit has been relocated to within the wood.

Therefore, the name this hill is now listed by in The Welsh P15s is Coed y Ringoed and this was derived from the contemporary Ordnance Survey 1:25,000 Explorer map. 

 

The full details for the hill are: 

Group:  Ysgyryd Fawr 

Name:  Coed y Ringoed

Previously Listed Name:  Pt. 101m 

OS 1:50,000 map:  161

Summit Height:  101.8m (LIDAR)                                                           

Summit Grid Reference:  SO 35923 05142 (LIDAR)                                                  

Bwlch Height:  86.1m (LIDAR) 

Bwlch Grid Reference:  SO 36156 05372 & SO 36159 05368 (LIDAR) 

Drop:  15.7m (LIDAR) 

 

Myrddyn Phillips (May 2025) 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Lan Fawr (SN 420 147) - 113th significant name change

Summit Relocations post for Lan Fawr

 

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 Lan Fawr (SN 420 147)

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 Mynydd Sylen group of hills, which are situated in the southern part of South Wales (Region B, Sub-Region B5), and it is positioned with a minor road to its north and south-east, the A484 road to its west and the B4309 road to its east, and has the town of Caerfyrddin (Carmarthen) towards the north.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 139m) notation with 15m of drop, based on the 139m summit spot height adjoined to a triangulation pillar positioned at SN 42032 14695 that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and the 124m bwlch spot height 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 554 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 Lan Fawr in the apportionments, with the details on the Tithe map appearing in the parish named as Llandyfaelog and in the county named as Carmarthen. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Sylen 

Name:  Lan Fawr

Previously Listed Name:  Pt. 139m 

OS 1:50,000 map:  159

Summit Height:  139.7m (LIDAR)                                                           

Summit Grid Reference:  SN 42050 14708 & SN 42058 14704 (LIDAR)

Bwlch Height:  123.3m (LIDAR) 

Bwlch Grid Reference:  SN 43780 15743 (LIDAR) 

Drop:  16.5m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Grib (SN 416 167) - 112th significant name change

Summit Relocations post for Grib

 

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 Grib (SN 416 167)

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 Mynydd Sylen group of hills, which are situated in the southern part of South Wales (Region B, Sub-Region B5), and it is positioned with a minor road to its immediate north and the A484 road to its east, and has the town of Caerfyrddin (Carmarthen) towards the north.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 101m) notation with an estimated c 19m of drop, based on the 101m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map, and an estimated c 82m bwlch height, based on interpolation of 5m contouring between 80m – 85m. 

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 223 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 Grib in the apportionments, with the details on the Tithe map appearing in the parish named as Llandyfaelog and in the county named as Carmarthen. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Sylen 

Name:  Grib

Previously Listed Name:  Pt. 101m 

OS 1:50,000 map:  159

Summit Height:  100.2m (LIDAR)                                                           

Summit Grid Reference:  SN 41603 16712 & SN 41604 16713 (LIDAR)

Bwlch Height:  80.7m (LIDAR) 

Bwlch Grid Reference:  SN 42380 16292 & SN 42379 16295 (LIDAR) 

Drop:  19.6m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Mawr (SN 462 175) - 111th significant name change

Summit Relocations post for Cae Mawr

 

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 (SN 462 175)

This hill is also listed as the natural summit for a Dual Summit 100m Twmpau and a Dual Summit Lesser Dominant hill along with the man-made summit of Safle Claddu Nant y Caws (SN 468174 and SN 469 174).  However, this hill also qualifies as a Welsh P15, without the distinction of it being a Dual Summit hill, with its bwlch listed adjoined to the higher man-made summit.

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 Mynydd Sylen group of hills, which are situated in the southern part of South Wales (Region B, Sub-Region B5), and it is positioned with the A48 road to its north and a minor road to its south-west, and has the town of Caerfyrddin (Carmarthen) towards the north-west.

When the original 100m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill appeared under the transposed name of Llwynmelyn, with an accompanying note stating; Name from buildings to the West.

Llwynmelyn

155m

SN464176

159

178

Clem/Yeaman. Trig pillar. Name from buildings to the West.

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

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

When the listing that became known as The Welsh P15s was being compiled, this hill was included as a separate entry in the main list under the point (Pt. 155m) notation with an estimated c 17m of drop, based on the 155m summit spot height adjoined to a triangulation pillar positioned at SN 46405 17608 that appears on the Ordnance Survey 1:50,000 Landranger andf 1:25,000 Explorer map, and an estimated c 138m bwlch height, based on interpolation of 5m contouring between 135m – 140m.  With the higher man-made summit of Safle Claddu Nant y Caws forming a part of the Dual Summit P30 entry in the 100m Twmpau. 

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 886 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 named as Llangynnwr and in the county named as Carmarthen.

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:  Mynydd Sylen 

Name:  Cae Mawr

Previously Listed Name:  Llwynmelyn (original 100m P30 list) Pt. 155m (original P15 list when summits were separated) 

OS 1:50,000 map:  159

Summit Height:  155.1m (LIDAR)                                                           

Summit Grid Reference:  SN 46268 17566 (LIDAR)                                                  

Bwlch Height:  139.3m (LIDAR) 

Bwlch Grid Reference:  SN 46733 17459 (LIDAR) 

Drop:  15.8m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Rhos Scythlyn (SN 430 361) - 110th significant name change

Summit Relocations post for Rhos Scythlyn

 

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 Rhos Scythlyn (SN 430 361)

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 Mynydd Pencarreg group of hills, which are situated in the south-western part of South Wales (Region B, Sub-Region B1), and it is positioned with minor roads to its north-east, west and south, and the B4459 road to its east, and has the town of Llandysul towards the north north-west.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 256m) notation with an estimated c 18m of drop, based on the 256m summit spot height positioned at SN 43015 36148 that appears on the Ordnance Survey 1:25,000 Explorer map, and an estimated c 238m bwlch height, based on interpolation of 5m contouring between 235m – 240m. 

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 298 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 Rhos Scythlyn in the apportionments, with the details on the Tithe map appearing in the parish named as Llanfihangel-ar-bryn and in the county named as Carmarthenshire. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Pencarreg 

Name:  Rhos Scythlyn

Previously Listed Name:  Pt. 256m 

OS 1:50,000 map:  146

Summit Height:  257.0m (LIDAR)                                                           

Summit Grid Reference:  SN 43043 36164 (LIDAR)                                                  

Bwlch Height:  239.3m (LIDAR) 

Bwlch Grid Reference:  SN 41655 34356 (LIDAR) 

Drop:  17.7m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Significant Name Changes - The Welsh P15s

Parc Gwastod (SN 300 359) - 109th significant name change

Hill Reclassifications post for Parc Gwastod

Summit Relocations post for Parc Gwastod

 

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 Parc Gwastod (SN 300 359)

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 Mynydd Pencarreg group of hills, which are situated in the south-western part of South Wales (Region B, Sub-Region B1), and it is positioned encircled by minor roads with the B4333 road farther to its east, and has the town of Castellnewydd Emlyn (Newcastle Emlyn) towards the north.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list under the point (Pt. 208m) notation with 15m of drop, based on the 208m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and the 193m 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 1204 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 Parc Gwastod in the apportionments, with the details on the Tithe map appearing in the parish named as Cilrhedyn and in the county named as Pembroke and Carmarthen. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Mynydd Pencarreg 

Name:  Parc Gwastod

Previously Listed Name:  Pt. 208m 

OS 1:50,000 map:  145

Summit Height:  208.0m (LIDAR)                                                           

Summit Grid Reference:  SN 30059 35918 & SN 30061 35921 & SN 30070 35947 & SN 30073 35949 & SN 30076 35949 (LIDAR)                                                  

Bwlch Height:  193.9m (LIDAR) 

Bwlch Grid Reference:  SN 30543 35784 (LIDAR) 

Drop:  14.2m (LIDAR) 

 

Myrddyn Phillips (April 2025)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Cwar y Tŷ (SN 907 499) - 108th significant name change

Hill Reclassifications post for Cae Cwar y Tŷ

Significant Height Revisions post for Cae Cwar y Tŷ

Summit Relocations post for Cae Cwar y Tŷ

 

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 Cwar y Tŷ (SN 907 499)

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 Drygarn Fawr group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with the A483 road to its north and a minor road to its south-west and east, and has the town of Llanwrtyd towards the south-west.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the accompanying sub list under the point (Pt. 257m) notation with 14m of drop, based on the 257m summit spot height and the 243m bwlch spot height, both of which 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 225 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 Cwar y Tŷ in the apportionments, with the details on the Tithe map appearing in the parish named as Llangamarch and in the county named as Brecon. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Drygarn Fawr 

Name:  Cae Cwar y Tŷ

Previously Listed Name:  Pt. 257m 

OS 1:50,000 map:  147

Summit Height:  259.0m (LIDAR)                                                           

Summit Grid Reference:  SN 90705 49957 (LIDAR)                                                  

Bwlch Height:  243.4m (LIDAR) 

Bwlch Grid Reference:  SN 90715 49674 & SN 90716 49675 (LIDAR) 

Drop:  15.6m (LIDAR) 

 

Myrddyn Phillips (April 2025) 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Pt. 423.1m (SH 715 748) - 107th 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 Pt. 423.1m (SH 715 748)

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 Carnedd Llywelyn 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 A55 road to its north, a minor road to its west south-west and the B5106 road to its east, and has the town of Penmaen-mawr towards the north.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main P15 list under the transposed name of Graig Lwyd, which is a prominent name that appears to the north of its summit on the Ordnance Survey 1:25,000 Explorer map and which is more applicable to an adjacent quarry rather than that of the hill. 

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

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, with little consideration for the meaning of the name and where it was appropriately applied to.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a near quarry and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found.

However, on occasion even when research is conducted an appropriate name for the hill may not be found, and on such occasions the listing protocol is to use the point (Pt. 423.1m) notation, and for this hill this is such an example.

Therefore, the name this hill is now listed by in The Welsh P15s is Pt. 423.1m and this is being used as the author has not found an appropriate name for the hill either through historic research and/or local enquiry. 

 

The full details for the hill are: 

Group:  Carnedd Llywelyn 

Name:  Pt. 423.1m

Previously Listed Name:  Graig Lwyd 

OS 1:50,000 map:  115

Summit Height:  423.1m (LIDAR)                                                           

Summit Grid Reference:  SH 71529 74810 (LIDAR)                                                  

Bwlch Height:  406.85m (LIDAR) 

Bwlch Grid Reference:  SH 71352 74759 (LIDAR) 

Drop:  16.2m (LIDAR) 

 

Myrddyn Phillips (March 2025)

 

Mapping Mountains - Significant Name Changes - The Welsh P15s

Cae Pant (SN 908 472) - 106th significant name change

Summit Relocations post for Cae Pant

 

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 Pant (SN 908 472)

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 Drygarn Fawr group of hills, which are situated in the central part of the South Wales Region (Region B, Sub-Region B1), and it is positioned with minor roads to its north-east and south, and the A483 road to its north-west, and has the town of Llanwrtyd towards the west.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main P15 list under the point (Pt. 214m) notation with an estimated c 16m of drop, based on the 214m summit spot height that is positioned at SN 90855 47214 and which appears on the Ordnance Survey 1:25,000 Explorer map, and an estimated c 198m bwlch height based on interpolation of 10m contouring between 190m – 200m. 

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 555 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 Pant in the apportionments, with the details on the Tithe map appearing in the parish named as Llangamarch and in the county named as Brecon. 

Extract from the apportionments

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

 

The full details for the hill are: 

Group:  Drygarn Fawr 

Name:  Cae Pant

Previously Listed Name:  Pt. 214m 

OS 1:50,000 map:  147

Summit Height:  214.5m (LIDAR)                                                           

Summit Grid Reference:  SN 90813 47233 (LIDAR)                                                  

Bwlch Height:  199.2m (LIDAR) 

Bwlch Grid Reference:  SN 90117 47253 (LIDAR) 

Drop:  15.3m (LIDAR) 

 

Myrddyn Phillips (March 2025)