Mapping Mountains – Summit Relocations – The Welsh P15s

 

The Welsh P15s – Summit Relocations

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 summit relocations 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 - Summit Relocations - The Welsh P15s

Coed Cefn Coch (SH 670 000) - 32nd summit relocation

Significant Name Changes post for Coed Cefn Coch

 

There has been a Summit Relocation 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 Coed Cefn Coch (SH 670 000)

The criteria for the list that this summit relocation 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 name the hill is listed by is Coed Cefn Coch, and it 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 farther to its south-east, and has the small community of Cwrt towards the east.

When the original 100m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was 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-assessed and it was listed with an estimated c 20m of drop, based on an estimated c 186m summit height positioned at SH 67033 00055 and an estimated c 166m bwlch height, with both heights based on interpolation of 10m contouring. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Coed Cefn Coch (SH 670 000)

LIDAR analysis gives the highest ground on this hill as 185.55m positioned at SH 67096 00076.  This position is in a different field to where the previous interpolated summit was given, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the listing of a new twin summit or de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 185.55m and is positioned at SH 67096 00076, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 63 metres north-eastward from where interpolation placed the previous summit position. 

 

The full details for the hill are: 

Group:  Tarren y Gesail 

Name:  Coed Cefn Coch 

OS 1:50,000 map:  135

Summit Height:  185.55m (LIDAR) 

Summit Grid Reference (New Position):  SH 67096 00076 (LIDAR) 

Bwlch Height:  166.5m (LIDAR) 

Bwlch Grid Reference:  SH 66830 00005 (LIDAR) 

Drop:  19.0m (LIDAR) 

 

Myrddyn Phillips (November 2025)

Mapping Mountains - Summit Relocations - The Welsh P15s

Belan Hill (SO 051 901) - 31st summit relocation

 

There has been a Summit Relocation 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 Belan Hill (SO 051 901)

The criteria for the list that this summit relocation 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 name the hill is listed by is Belan Hill, and it is adjoined to the Hirddywel group of hills, which are situated in the northern part of South Wales (Region B, Sub-Region B2), and it is positioned with the A489 road to its north and minor roads to its west, south and east, and has the town of Y Drenewydd (Newtown) towards the east.

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 with an estimated c 20m of drop, based on an estimated c 311m summit height and an estimated c 291m bwlch height, with both heights based on interpolation of 5m contouring. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 311.6m positioned at SO 05113 90148.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Belan Hill (SO 051 901)

The height produced by LIDAR analysis to the natural summit of this hill is 311.4m and is positioned at SO 05114 90152, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the listing of a new twin summit or de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 311.4m and is positioned at SO 05114 90152, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 4 metres northward from where the high point of the raised field boundary is positioned. 

 

The full details for the hill are: 

Group:  Hirddywel 

Name:  Belan Hill 

OS 1:50,000 map:  136

Summit Height:  311.4m (LIDAR)                                                           

Summit Grid Reference (New Position):  SO 05114 90152 (LIDAR) 

Bwlch Height:  292.5m (LIDAR) 

Bwlch Grid Reference:  SO 05157 90001 & SO 05157 90000 (LIDAR) 

Drop:  19.0m (LIDAR) 

 

Myrddyn Phillips (August 2025)

Mapping Mountains - Summit Relocations - The Welsh P15s

Ffridd (SN 730 979) - 30th summit relocation

Significant Height Revisions post for Ffridd

Significant Name Changes post for Ffridd

 

There has been a Summit Relocation 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 (SN 730 979)

The criteria for the list that this summit relocation 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 name the hill is listed by is Ffridd and this was derived from the Tithe map, and it is adjoined to the Banc Llechwedd Mawr group of hills, which are situated in the north-western part of South Wales (Region B, Sub-Region B1), and it is positioned with the A487 road to its north-west and minor roads to its south and east, and has the town of Machynlleth towards the north north-east.

When the original 200m 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. 

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

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with an estimated c 22m of drop, based on the twin 216m summit spot heights positioned at SN 72979 97898 and SN 73120 98126 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 194m bwlch height, based on interpolation of 10m contouring between 190m – 200m.

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Ffridd (SN 730 979)

LIDAR analysis gives the highest ground on this hill as 209.7m positioned at SN 73032 97996, with LIDAR also giving 206.6m positioned at SN 73124 98128 which corresponds to the position of the northerly of the two spot heights that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map.  As LIDAR analysis has de-twinned the summit of this hill this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 209.7m and is positioned at SN 73032 97996, this position is approximately 132 metres south-westward from the position of the lower of what were previously listed as twin summits that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

 

The full details for the hill are:

Group:  Banc Llechwedd Mawr 

Name:  Ffridd 

OS 1:50,000 map:  135

Summit Height:  209.7m (LIDAR) 

Summit Grid Reference (New Position):  SN 73032 97996 (LIDAR) 

Bwlch Height:  193.9m (LIDAR) 

Bwlch Grid Reference:  SN 72854 98987 & SN 72854 97990 (LIDAR) 

Drop:  15.8m (LIDAR) 

 

Myrddyn Phillips (July 2025)

Mapping Mountains - Summit Relocations - The Welsh P15s

Y Foel (SN 730 992) - 29th summit relocation

Hill Reclassifications post for Y Foel

Significant Name Changes post for Y Foel

 

There has been a Summit Relocation 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 Y Foel (SN 730 992)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Y Foel, and this was derived from the Tithe map, and it is adjoined to the Banc Llechwedd Mawr group of hills, which are situated in the north-western part of South Wales (Region B, Sub-Region B1), and it is positioned with the A487 road to its north-west and minor roads to its south and east, and has the town of Machynlleth 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 with an estimated c 15m of drop, based on the 143m summit spot height positioned at SN 72970 99159 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 128m bwlch height, based on interpolation of 10m contouring between 120m – 130m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Y Foel (SN 730 992)

The height produced by LIDAR analysis to the summit of this hill is 143.8m and is positioned at SN 73037 99236, whilst LIDAR gives the highest ground adjacent to where the 143m spot height appeared as 143.5m positioned at SN 72974 99157, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 143.8m and is positioned at SN 73037 99236, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, but was given a 142m spot height on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and is approximately 77 metres north-eastward from where the highest ground adjacent to the 143m spot height appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

 

The full details for the hill are: 

Group:  Banc Llechwedd Mawr 

Name:  Y Foel 

OS 1:50,000 map:  135

Summit Height:  143.8m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 73037 99236 (LIDAR)                                                  

Bwlch Height:  129.1m (LIDAR) 

Bwlch Grid Reference:  SN 73017 99102 (LIDAR) 

Drop:  14.7m (LIDAR) 

 

Myrddyn Phillips (June 2025)

Mapping Mountains - Summit Relocations - The Welsh P15s

Crug yr Hwch (SN 173 325) - 28th summit relocation

 

There has been a Summit Relocation 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 Crug yr Hwch (SN 173 325)

The criteria for the list that this summit relocation 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 name the hill is listed by is Crug yr Hwch, and it is adjoined to the Mynydd Preseli 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, west and south, and the A478 road to its east, and has the town of Trefdraeth (Newport) 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 with an estimated c 17m of drop, based on the 318m summit spot height positioned at SN 17351 32530 that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 301m bwlch height, based on interpolation of 5m contouring between 300m – 305m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 319.5m positioned at SN 17336 32490.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Crug yr Hwch (SN 173 325)

The height produced by LIDAR analysis to the natural summit of this hill is 318.8m and is positioned at SN 17338 32531 and SN 17345 32540, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 318.8m and is positioned at SN 17338 32531 and SN 17345 32540, this position is relatively close to where the spot height appears on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 50 metres northward from where the high point of the raised field boundary is positioned. 

 

The full details for the hill are: 

Group:  Mynydd Preseli 

Name:  Crug yr Hwch 

OS 1:50,000 map:  145

Summit Height:  318.8m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 17338 32531 & SN 17345 32540 (LIDAR)

Bwlch Height:  300.9m (LIDAR) 

Bwlch Grid Reference:  SN 17411 31829 (LIDAR) 

Drop:  17.9m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Summit Relocations - The Welsh P15s

Parc Mawr (SN 034 364) - 27th summit relocation

 

There has been a Summit Relocation 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 Parc Mawr (SN 034 364)

The criteria for the list that this summit relocation 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 name the hill is listed by is Parc Mawr, and it is adjoined to the Mynydd Preseli 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, west and south-east, and the A478 road to its north, and has the town of Trefdraeth (Newport) 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 with an estimated c 16m of drop, based on the 307m summit spot height positioned at SN 03409 36517 that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 291m bwlch height, based on interpolation of 5m contouring between 290m – 295m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 308.2m positioned at SN 03476 36433.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Parc Mawr (SN 034 364)

The height produced by LIDAR analysis to the natural summit of this hill is 308.0m and is positioned at SN 03418 36489, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 308.0m and is positioned at SN 03418 36489, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 28 metres south south-eastward from where the 307m spot height is positioned, and approximately 58 metres north-westward from where the high point of the raised field boundary is positioned. 

 

The full details for the hill are: 

Group:  Mynydd Preseli 

Name:  Parc Mawr 

OS 1:50,000 map:  145

Summit Height:  308.0m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 03418 36489 (LIDAR)                                                  

Bwlch Height:  290.3m (LIDAR) 

Bwlch Grid Reference:  SN 03863 36564 (LIDAR) 

Drop:  17.8m (LIDAR) 

 

Myrddyn Phillips (May 2025)

 

Mapping Mountains - Summit Relocations - The Welsh P15s

Y Lan Cwm Gwilym Fach (SO 070 364) - 26th summit relocation

Significant Name Changes post for Y Lan Cwm Gwilym Fach

 

There has been a Summit Relocation 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 Y Lan Cwm Gwilym Fach (SO 070 364)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Y Lan Cwm Gwilym Fach, and this was derived from the Tithe map, and it 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 with an estimated c 14 of drop, based on the 367m summit spot height positioned at SO 07022 36442 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 367.5m positioned at SO 07050 36413.  However, this is to the top of the remains of a boundary to an old conifer plantation and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Y Lan Cwm Gwilym Fach (SO 070 364)

The height produced by LIDAR analysis to the natural summit of this hill is 367.4m and is positioned at SO 07042 36407, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 367.4m and is positioned at SO 07042 36407, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 35 metres south-eastward from where the spot height is positioned and approximately 8 metres south-westward from where the high point of the boundary of the old conifer plantation is positioned. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Y Lan Cwm Gwilym Fach 

OS 1:50,000 map:  160

Summit Height:  367.4m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Cae Duon (SJ 075 090) - 25th summit relocation

Significant Name Changes post for Cae Duon

 

There has been a Summit Relocation 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 summit relocation 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 name the hill is now listed by is Cae Duon, and this was derived from the Tithe map, and it 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 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 167.8m positioned at SJ 07595 09031.  However, this is to the top of a man-made mound and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Duon (SJ 075 090)

The height produced by LIDAR analysis to the natural summit of this hill is 167.2m and is positioned at SJ 07592 09025, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 167.2m and is positioned at SJ 07592 09025, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 11 metres north-eastward from where the spot height appears on the road and approximately 6 metres south-westward from the high point of the man-made mound. 

 

The full details for the hill are: 

Group:  Carnedd Wen 

Name:  Cae Duon 

OS 1:50,000 map:  125

Summit Height:  167.2m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Cae Llidiart Fawr (SJ 085 095) - 24th summit relocation

Significant Name Changes post for Cae Llidiart Fawr

 

There has been a Summit Relocation 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 summit relocation 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 name the hill is now listed by is Cae Llidiart Fawr, and this was derived from the Tithe map, and it 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 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 190.7m positioned at SJ 08508 09511.  However, this is to the top of a hedge bank and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Llidiart Fawr (SJ 085 095)

The height produced by LIDAR analysis to the highest remaining natural ground of this hill is 190.1m and is positioned at SJ 08505 09512, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 190.1m and is positioned at SJ 08505 09512, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 3 metres west north-westward from where the high point of the hedge bank is positioned. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Cae Llidiart Fawr 

OS 1:50,000 map:  125

Summit Height:  190.1m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Cae Tŷ (SJ 077 107) - 23rd summit relocation

Hill Reclassifications post for Cae Tŷ

Significant Name Changes post for Cae Tŷ

 

There has been a Summit Relocation 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 summit relocation 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 name the hill is now listed by is Cae Tŷ, and this was derived from the Tithe map, and it 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 with an estimated c 14m of drop, based on the 208m summit spot height positioned at SJ 07800 10746 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Cae Tŷ (SJ 077 107)

LIDAR analysis gives the highest ground on this hill as 209.7m positioned at SJ 07785 10758.  However, this is to the top of a mound of discarded rocks that is now overgrown, as evidenced by the Google Maps photo below, and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

Photo:  Google Maps

The height produced by LIDAR analysis to the natural summit of this hill is 208.5m and is positioned at SJ 07741 10751, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 208.5m and is positioned at SJ 07741 10751, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 44 metres eastward from where the high point of the man-made mound and spot height is positioned. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  Cae Tŷ 

OS 1:50,000 map:  125

Summit Height:  208.5m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

New Field (SJ 078 114) - 22nd summit relocation

Significant Name Changes post for New Field

 

There has been a Summit Relocation 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 New Field (SJ 078 114)

The criteria for the list that this summit relocation 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 name the hill is now listed by is New Field, and this was derived from the Tithe map, and it 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 with 19m of drop, based on the 210m summit spot height positioned at SJ 07870 11461 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 210.9m positioned at SJ 07880 11463.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of New Field (SJ 078 114)

The height produced by LIDAR analysis to the natural summit of this hill is 210.55m and is positioned at SJ 07868 11468, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 210.55m and is positioned at SJ 07868 11468, this position is relatively close to where the spot height appears, and is approximately 12 metres north-westward from where the high point of the raised field boundary is positioned. 

 

The full details for the hill are: 

Group:  Esgeiriau Gwynion 

Name:  New Field 

OS 1:50,000 map:  125

Summit Height:  210.55m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Lan Ffynnon Las & Disgwylfa (SN 998 433) - 21st summit relocation

Significant Name Changes post for Lan Ffynnon Las & Disgwylfa

 

There has been a Summit Relocation 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 Lan Ffynnon Las & Disgwylfa (SN 998 433)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Lan Ffynnon Las & Disgwylfa, and this was derived from the Tithe map, and it 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 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 392.3m positioned at SN 99808 43287.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Lan Ffynnon Las & Disgwylfa (SN 998 433)

The height produced by LIDAR analysis to the natural summit of this hill is 392.0m and is positioned at SN 99802 43305, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 392.0m and is positioned at SN 99802 43305, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 50 metres northward and placed in a different field from the position of the previously listed summit at the spot height, and approximately 18 metres north-westward from where the high point of the raised field boundary is positioned. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Lan Ffynnon Las & Disgwylfa 

OS 1:50,000 map:  147, 160

Summit Height:  392.0m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Mynydd Aberysgir (SN 985 312) - 20th summit relocation

Significant Name Changes post for Mynydd Aberysgir

 

There has been a Summit Relocation 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 Mynydd Aberysgir (SN 985 312)

The criteria for the list that this summit relocation 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 name the hill is listed by is Mynydd Aberysgir, and this was derived from the Tithe map, and it 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 with an estimated c 18m of drop, based on the 341m twin summit spot heights positioned at SN 98586 31211 on the Ordnance Survey 1:25,000 Explorer map and SN 98676 31149 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Mynydd Aberysgir (SN 985 312)

LIDAR analysis gives the highest ground on this hill as 341.1m positioned at SN 98578 31205 which corresponds to the position of the spot height that appears on the Ordnance Survey 1:25,000 Explorer map, with LIDAR also giving 340.8m positioned at SN 98676 31157 which corresponds to the position of the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map.  As LIDAR analysis has de-twinned the summit of this hill this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 341.1m and is positioned at SN 98578 31205, this position corresponds to the spot height on the contemporary Ordnance Survey 1:25,000 Explorer map and is approximately 100 metres north-westward from the position of the previously listed twin summit at the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Mynydd Aberysgir 

OS 1:50,000 map:  160

Summit Height:  341.1m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Pt. 183.5m (SN 375 052) - 19th summit relocation

 

There has been a Summit Relocation 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 Pt. 183.5m (SO 375 052)

The criteria for the list that this summit relocation 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 being listed by the point (Pt. 183.5m) notation, and it 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 encircled by minor roads, with the B4598 road farther to its south-west, and has the town of Brynbuga (Usk) towards the south.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main list with an estimated c 16m of drop, based on the 183m summit spot height positioned at SO 37555 05221 that appears on the Ordnance Survey 1:25,000 Explorer map, and an estimated c 167m bwlch height, based on interpolation of 5m contouring between 165m – 170m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 183.7m positioned at SO 37563 05219.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Pt. 183.5m (SO 375 052)

The height produced by LIDAR analysis to the natural summit of this hill is 183.5m and is positioned at SO 37547 05248, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 183.5m and is positioned at SO 37547 05248, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 27 metres north-westward from the position of the previously listed summit at the spot height, and approximately 29 metres north-westward from where the high point of the raised field boundary is positioned. 

 

The full details for the hill are: 

Group:  Ysgyryd Fawr 

Name:  Pt. 183.5m 

OS 1:50,000 map:  161

Summit Height:  183.5m (LIDAR)                                                           

Summit Grid Reference (New Position):  SO 37547 05248 (LIDAR)                                                  

Bwlch Height:  168.15m (LIDAR) 

Bwlch Grid Reference:  SO 37322 05167 (LIDAR) 

Drop:  15.3m (LIDAR) 

 

Myrddyn Phillips (May 2025)

Mapping Mountains - Summit Relocations - The Welsh P15s

Coed y Ringoed (SO 359 051) - 18th summit relocation

Significant Name Changes post for Coed y Ringoed

 

There has been a Summit Relocation 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 Coed y Ringoed (SO 359 051)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Coed y Ringoed, and it 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 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR image of the old summit position of Coed y Ringoed

The height produced by LIDAR analysis to the summit of this hill is 101.8m and is positioned at SO 35923 05142, whilst LIDAR gives the highest ground adjacent to where the 101m spot height appeared as 101.4m positioned at SO 36016 05209 and SO 36022 05207, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 101.8m and is positioned at SO 35923 05142, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 93 metres south-eastward from where the highest ground adjacent to the 101m spot height was given on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

 

The full details for the hill are: 

Group:  Ysgyryd Fawr 

Name:  Coed y Ringoed 

OS 1:50,000 map:  161

Summit Height:  101.8m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Lan Fawr (SN 420 147) - 17th summit relocation

Significant Name Changes post for Lan Fawr

 

There has been a Summit Relocation 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 Lan Fawr (SN 420 147)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Lan Fawr, and this was derived from the Tithe map, and it 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 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 140.5m positioned at SN 42209 14782.  However, this is to the top of a raised track and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Llan Fawr (SN 420 147)

The height produced by LIDAR analysis to the summit of this hill is 139.7m and is positioned at SN 42050 14708 and SN 42058 14704, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 139.7m and is positioned at SN 42050 14708 and SN 42058 14704, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 18 metres north-eastward from where the triangulation pillar is positioned and approximately 159 metres west south-westward from where the high point of the raised track is positioned. 

 

The full details for the hill are: 

Group:  Mynydd Sylen 

Name:  Lan Fawr 

OS 1:50,000 map:  159

Summit Height:  139.7m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Grib (SN 416 167) - 16th summit relocation

Significant Name Changes post for Grib

 

There has been a Summit Relocation 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 Grib (SN 416 167)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Grib, and this was derived from the Tithe map, and it 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 with an estimated c 19m of drop, based on the 101m summit spot height positioned at SN 41595 16715 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 100.4m positioned at SN 41593 16714.  However, this is to the top of a raised road and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Grib (SN 416 167)

The height produced by LIDAR analysis to the summit of this hill is 100.2m and is positioned at SN 41603 16712 and SN 41604 16713, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 100.2m and is positioned at SN 41603 16712 and SN 41604 16713, this position is not given a spot height on the contemporary Ordnance Survey 1:25,000 Explorer map and is approximately 9 metres east south-eastward from where the 101m spot height is positioned which also corresponds to the position of the high point of the raised road. 

 

The full details for the hill are: 

Group:  Mynydd Sylen 

Name:  Grib 

OS 1:50,000 map:  159

Summit Height:  100.2m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Cae Mawr (SN 462 175) - 15th summit relocation

Significant Name Changes post for Cae Mawr

 

There has been a Summit Relocation 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 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 summit relocation 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 name the hill is now listed by is Cae Mawr, and this was derived from the Tithe map, and it 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 listing that became known as The Welsh P15s was being compiled, this hill was included in the main list 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. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 156.3m positioned at SN 46256 17561.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Mawr (SN 462 175)

The height produced by LIDAR analysis to the highest remaining natural ground of this hill is 155.1m and is positioned at SN 46268 17566, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 155.1m and is positioned at SN 46268 17566, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 137 metres west south-westward from where the originally listed summit is positioned and approximately 12 metres east north-eastward from the high point of the raised field boundary. 

 

The full details for the hill are: 

Group:  Mynydd Sylen 

Name:  Cae Mawr 

OS 1:50,000 map:  159

Summit Height:  155.1m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Rhos Scythlyn (SN 430 361) - 14th summit relocation

Significant Name Changes post for Rhos Scythlyn

 

There has been a Summit Relocation 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 Rhos Scythlyn (SN 430 361)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Rhos Scythlyn, and this was derived from the Tithe map, and it 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 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 257.35m positioned at SN 42955 36082.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Rhos Scythlyn (SN 430 361)

The height produced by LIDAR analysis to the summit of this hill is 257.0m and is positioned at SN 43043 36164, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 257.0m and is positioned at SN 43043 36164, this position is not given a spot height on the contemporary Ordnance Survey 1:25,000 Explorer map and is approximately 28 metres north-westward from where the 256m spot height is positioned and approximately 90 metres north-westward from the high point of the raised field boundary. 

 

The full details for the hill are: 

Group:  Mynydd Pencarreg 

Name:  Rhos Scythlyn 

OS 1:50,000 map:  146

Summit Height:  257.0m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Parc Gwastod (SN 300 359) - 13th summit relocation

Hill Reclassifications post for Parc Gwastod

Significant Name Changes post for Parc Gwastod

 

There has been a Summit Relocation 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 Parc Gwastod (SN 300 359)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Parc Gwastod, and this was derived from the Tithe map, and it 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 with 15m of drop, based on the 208m summit spot height positioned at SN 30119 35939 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 209.1m positioned at SN 30088 35919.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Parc Gwastod (SN 300 359)

The height produced by LIDAR analysis to the natural summit of this hill is 208.0m and is positioned at SN 30059 35918 and SN 30061 35921 and SN 30070 35947 and SN 30073 35949 and SN 30076 35949, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or the de-twinning of a summit, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 208.0m and is positioned at SN 30059 35918 and SN 30061 35921 and SN 30070 35947 and SN 30073 35949 and SN 30076 35949, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 60 metres south-westward from where the 208m spot height is positioned and approximately 30 metres westward from the high point of the raised field boundary. 

 

The full details for the hill are: 

Group:  Mynydd Pencarreg 

Name:  Parc Gwastod 

OS 1:50,000 map:  145

Summit Height:  208.0m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Cae Cwar y Tŷ (SN 907 499) - 12th summit relocation

Hill Reclassifications post for Cae Cwar y Tŷ

Significant Height Revisions post for Cae Cwar y Tŷ

Significant Name Changes post for Cae Cwar y Tŷ

 

There has been a Summit Relocation 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 Cwar y Tŷ (SN 907 499)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Cae Cwar y Tŷ, and this was derived from the Tithe map, and it 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 with 14m of drop, based on the 257m summit spot height positioned at SN 90720 49939 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 259.1m positioned at SN 90712 49930 and SN 90717 49931.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Cwar y Tŷ (SN 907 499)

The height produced by LIDAR analysis to the natural summit of this hill is 259.0m and is positioned at SN 90705 49957, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 259.0m and is positioned at SN 90705 49957, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 18 metres north-westward from where the 257m spot height was positioned and approximately 26 metres north-westward from the high point of the raised field boundary. 

 

The full details for the hill are: 

Group:  Drygarn Fawr 

Name:  Cae Cwar y Tŷ 

OS 1:50,000 map:  147

Summit Height:  259.0m (LIDAR)                                                           

Summit Grid Reference (New Position):  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 - Summit Relocations - The Welsh P15s

Cae Pant (SN 908 472) - 11th summit relocation

Significant Name Changes post for Cae Pant

 

There has been a Summit Relocation 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 Pant (SN 908 472)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Cae Pant, and this was derived from the Tithe map, and it 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 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 215.2m positioned at SN 90818 47253.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Pant (SN 908 472)

The height produced by LIDAR analysis to the natural summit of this hill is 214.5m and is positioned at SN 90813 47233, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour either on Ordnance Survey maps or interactive mapping, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 214.5m and is positioned at SN 90813 47233, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 42 metres north-westward from where the 214m spot height is positioned and 20 metres southward from the high point of the raised field boundary. 

 

The full details for the hill are: 

Group:  Drygarn Fawr 

Name:  Cae Pant 

OS 1:50,000 map:  147

Summit Height:  214.5m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 90813 47233 (LIDAR)                                                  

Bwlch Height:  199.2m (LIDAR) 

Bwlch Grid Reference:  SN 90117 47253 (LIDAR) 

Drop:  15.3m (LIDAR) 

 

Myrddyn Phillips (March 2025) 

Mapping Mountains - Summit Relocations - The Welsh P15s

Cae Plu (SN 562 035) - 10th summit relocation

Hill Reclassifications post for Cae Plu

Significant Name Changes post for Cae Plu

 

There has been a Summit Relocation 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 Plu (SN 562 035)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Cae Plu, and this was derived from the Tithe map, and it 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, the A4138 road to its south and the M4 motorway to its east, and has the town of Llanelli 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 with an estimated c 14m of drop, based on the 106m summit spot height that was positioned at SN 56242 03523 and which 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 92m bwlch height based on interpolation of 5m contouring between 90m – 95m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 107.6m positioned at SN 56243 03507.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Plu (SN 562 035)

The height produced by LIDAR analysis to the natural summit of this hill is 106.65m and is positioned at SN 56249 03517, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is judged to be a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 106.65m and is positioned at SN 56249 03517, this position is relatively close to where the 106m spot height appeared, and is approximately 10 metres north-eastward from the high point of the raised field boundary. 

 

The full details for the hill are: 

Group:  Mynydd Sylen 

Name:  Cae Plu 

OS 1:50,000 map:  159

Summit Height:  106.65m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 56249 03517 (LIDAR)                                                  

Bwlch Height:  91.5m (LIDAR) 

Bwlch Grid Reference:  SN 56274 03613 (LIDAR) 

Drop:  15.15m (LIDAR) 

 

Myrddyn Phillips (February 2025)

Mapping Mountains - Summit Relocations - The Welsh P15s

Cae Eithin (SO 096 286) - 9th summit relocation

Significant Name Changes post for Cae Eithin

 

There has been a Summit Relocation 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 Eithin (SO 096 286)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Cae Eithin and this was derived from the Tithe map, and it 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 A470 road farther to its west and the A40 road farther to its south, and has the town of Aberhonddu (Brecon) towards the west.

When the listing that became known as The Welsh P15s was being compiled, this hill was listed with an estimated c 16m of drop, based on the 278m summit spot height that is positioned at SO 09686 28687 and which appears on the contemporary Ordnance Survey 1:25,000 Explorer map and an estimated c 262m bwlch height, based on interpolation of 10m contouring between 260m – 270m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 278.9m positioned at SO 09665 28680.  However, this is to the top of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Eithin (SO 096 286)

The height produced by LIDAR analysis to the natural summit of this hill is 278.6m and is positioned at SO 09665 28664 and SO 09667 28664, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies when the high point of the hill is found to be positioned; in a different field, to a different feature such as in a conifer plantation,  within a different map contour, to a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is judged to be a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 278.6m and is positioned at SO 09665 28664 and SO 09667 28664, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 23 metres south south-westward from where the spot height appears on the Ordnance Survey 1:25,000 Explorer map and importatly also positioned in a different field, and approximately 16 metres southward from the high point of the raised field boundary. 

 

The full details for the hill are: 

Group:  Mynydd Epynt 

Name:  Cae Eithin 

OS 1:50,000 map:  161

Summit Height:  278.6m (LIDAR)                                                           

Summit Grid Reference (New Position):  SO 09665 28664 & SO 09667 28664 (LIDAR) 

Bwlch Height:  262.1m (LIDAR) 

Bwlch Grid Reference:  SO 09165 28809 (LIDAR) 

Drop:  16.5m (LIDAR) 

 

Myrddyn Phillips (July 2024) 

Mapping Mountains - Summit Relocations - The Welsh P15s

Cefn Gwrhyd (SN 737 096) - 8th summit relocation

Hill Reclassifications post for Cefn Gwrhyd

Significant Height Revisions post for Cefn Gwrhyd

 

There has been a Summit Relocation 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 Cefn Gwrhyd (SN 737 096)

The criteria for the list that this summit relocation 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 name the hill is listed by is Cefn Gwrhyd, and it is adjoined to the Mynydd Du group of hills, which are situated in the southern part of South Wales (Region B, Sub-Region B5), and it is positioned with the A4068 road to its north-east, the A474 road to its west, the A4067 road to its south-east and a minor road to its immediate east, and has the community of Y Gurnos towards the east.

When the listing that became known as The Welsh P15s was being compiled, this hill was not included as with a 291m spot height in the vicinity of its summit and bwlch contouring between 280m – 290m that appear on the contemporary Ordnance Survey 1:25,000 Explorer map, it was judged not to meet the criterion for the main P15 or the accompanying P14 sub list.  With an interpolated summit position later noted to an ancient cairn at SN 73735 09589. 

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 300m summit spot height is given. 

Extract from the interactive mapping hosted on the WalkLakes website

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Cefn Gwrhyd (SN 737 096)

LIDAR analysis gives the highest ground on this hill as 300.5m positioned at SN 73765 09682, and this position comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies to when the high point of the hill is positioned in a different field, to a different feature such as a conifer plantation, within a different map contour, a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 300.5m and this is positioned at SN 73765 09682, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 93 metres north north-eastward from where the ancient cairn is positioned. 

 

The full details for the hill are: 

Group:  Mynydd Du 

Name:  Cefn Gwrhyd 

OS 1:50,000 map:  160

Summit Height:  300.5m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 73765 09682 (LIDAR) 

Bwlch Height:  283.1m (LIDAR) 

Bwlch Grid Reference:  SN 73543 09172 (LIDAR) 

Drop:  17.3m (LIDAR) 

 

Myrddyn Phillips (June 2024)

Mapping Mountains - Summit Relocations - The Welsh P15s

Cae Cenfas Ucha (SN 751 118) - 7th summit relocation

Hill Reclassifications post for Cae Cenfas Ucha

Significant Height Revisions post for Cae Cenfas Ucha

Significant Name Changes post for Cae Cenfas Ucha

 

There has been a Summit Relocation 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 0f Cae Cenfas Ucha (SN 751 118)

The criteria for the list that this summit relocation 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 name the hill is listed by is Cae Cenfas Ucha and this was derived from the Tithe map, and it is adjoined to the Mynydd Du 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 west and south, and the A4068 road to its east, and has the community of Y Gurnos towards the south-east. 

Extract from the Ordnance Survey 1:50,000 Landranger map

When the listing that became known as The Welsh P15s was being compiled, this hill was not included as with an uppermost 170m contour and bwlch contouring between 160m – 170m 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. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 183.2m positioned at SN 75115 11857.  However, this is a part of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Cae Cenfas Ucha (SN 751 118)

The height produced by LIDAR analysis to the natural summit of this hill is 182.8m and this is positioned at SN 75108 11870, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies to when the high point of the hill is positioned in a different field, to a different feature such as a conifer plantation, within a different map contour, a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the height produced by LIDAR analysis to the natural summit of this hill is 182.8m and this is positioned at SN 75108 11870, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 13 metres north north-westward from where the high point of the raised field boundary is positioned.

 

The full details for the hill are: 

Group:  Mynydd Du 

Name:  Cae Cenfas Ucha 

OS 1:50,000 map:  160

Summit Height:  182.8m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 75108 11870 (LIDAR) 

Bwlch Height:  164.5m (LIDAR) 

Bwlch Grid Reference:  SN 75202 12488 (LIDAR) 

Drop:  18.3m (LIDAR) 

 

Myrddyn Phillips (May 2024)

Mapping Mountains - Summit Relocations - The Welsh P15s

Y Garreg Las (SN 768 098) - 6th summit relocation

Hill Reclassifications post for Y Garreg Las

Significant Name Changes post for Y Garreg Las

 

There has been a Summit Relocation 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 Y Garreg Las (SN 768 098)

The criteria for the list that this summit relocation 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 name the hill is now listed by is Y Garreg Las and this was derived from the Tithe map and it is adjoined to the Mynydd Du 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-east, and west, the A4068 road farther to its north-east and the A4067 road to its south-east, and has the community of Y Gurnos towards the east south-east. 

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

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the P14 sub list with an estimated c 14m of drop, based on the 157m summit spot height positioned at SN 76897 09754 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 143m bwlch height, based on interpolation of 5m contouring between 140m – 145m that appeared on the OS Maps website.  Latterly the interactive mapping hosted on the WalkLakes website gives this hill a 158m summit spot height. 

Extract from the interactive mapping hosted on the WalkLakes website

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Y Garreg Las (SN 768 098)

LIDAR analysis gives the highest ground on this hill as 158.5m positioned at SN 76803 09804, and this position comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies to when the high point of the hill is positioned in a different field, to a different feature such as a conifer plantation, within a different map contour, a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 158.5m and this is positioned at SN 76803 09804, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 95 metres north-westward from where the originally listed summit is positioned. 

 

The full details for the hill are: 

Group:  Mynydd Du 

Name:  Y Garreg Las 

OS 1:50,000 map:  160

Summit Height:  158.5m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 76803 09804 (LIDAR) 

Bwlch Height:  141.7m (LIDAR) 

Bwlch Grid Reference:  SN 76797 09723 (LIDAR) 

Drop:  16.75m (LIDAR) 

 

Myrddyn Phillips (April 2024)

 

Mapping Mountains - Summit Relocations - The Welsh P15s

Bryn Cysegrfa (SN 643 521) - 5th summit relocation

 

There has been a Summit Relocation 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 Bryn Cysegrfa (SN 643 521)

The criteria for the list that this summit relocation 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 name the hill is listed by is Bryn Cysegrfa, and it is adjoined to the Esgair Wen group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with the B4343 road to its north-west and minor roads to its south-west and east, and has the town of Llanbedr Pont Steffan (Lampeter) towards the south-west.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main P15 list with an estimated c 20m of drop, based on the 337m summit spot height positioned at SN 64351 52092 that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 317m bwlch height, based on interpolation of 10m contouring between 310m – 320m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 338.4m positioned at SN 64317 52119.  However, this is a part of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Bryn Cysegrfa (SN 643 521)

The height produced by LIDAR analysis to the natural summit of this hill is 338.3m positioned at SN 64313 52109, and this position in relation to the raised field boundary comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies to when the high point of the hill is positioned in a different field, to a different feature such as a conifer plantation, within a different map contour, a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 338.3m and this is to the natural summit of the hill which is positioned at SN 64313 52109, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 40 metres westward from where the 337m spot height appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and approximately 10 metres southward from where the high point of the raised field boundary is positioned. 

 

The full details for the hill are: 

Group:  Esgair Wen 

Name:  Bryn Cysegrfa 

OS 1:50,000 map:  146

Summit Height:  338.3m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 64313 52109 (LIDAR) 

Bwlch Height:  318.8m (LIDAR) 

Bwlch Grid Reference:  SN 64689 52334 (LIDAR) 

Drop:  19.5m (LIDAR) 

 

Myrddyn Phillips (April 2023)

 

Mapping Mountains - Summit Relocations - The Welsh P15s

Tyn Ffynnon (SN 549 487) - 4th summit relocation

Hill Reclassifications post for Tyn Ffynnon

Significant Name Changes post for Tyn Ffynnon

 

There has been a Summit Relocation 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 Tyn Ffynnon (SN 549 487)

The criteria for the list that this summit relocation 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 name the hill is listed by is Tyn Ffynnon and this was derived from the Tithe map and it is adjoined to the Mynydd Bach group of hills, which are situated in the western part of South Wales (Region B, Sub-Region B1), and it is positioned encircled by minor roads, with the B4337 road farther to its west, the A475 road farther to its south and the A482 road farther to its east, and has the town of Llanbedr Pont Steffan (Lampeter) 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 P15 list with an estimated c 16m of drop, based on the 224m summit spot height positioned at SN 55020 48780 that appears on the Ordnance Survey 1:50,000 Landranger map and 1:25,000 Explorer map and an estimated c 208m bwlch height, based on interpolation of 5m contouring between 205m - 210m 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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

LIDAR analysis gives the highest ground on this hill as 224.4m positioned at SN 54973 48741.  However, this is a part of a raised field boundary and protocols dictate that as this is deemed a relatively recent man-made construct such ground is discounted from the height of a hill. 

LIDAR summit image of Tyn Ffynnon (SN 549 487)

The height produced by LIDAR analysis to the natural summit of this hill is 224.3m positioned at SN 54956 48738, and this position in relation to the raised field boundary comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies to when the high point of the hill is positioned in a different field, to a different feature such as a conifer plantation, within a different map contour, a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 224.3m and this is to the natural summit of the hill which is positioned at SN 54956 48738, this position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and is approximately 70 metres south-westward from where the 224m spot height appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and 17 metres westward from where the high point of the raised field boundary is positioned.

 

The full details for the hill are: 

Group:  Mynydd Bach 

Name:  Tyn Ffynnon 

OS 1:50,000 map:  146

Summit Height:  224.3m (LIDAR)                                                           

Summit Grid Reference (New Position):  SN 54956 48738 (LIDAR) 

Bwlch Height:  210.0m (LIDAR) 

Bwlch Grid Reference:  SN 55631 48720 (LIDAR) 

Drop:  14.3m (LIDAR) 

 

Myrddyn Phillips (December 2022)

 

Mapping Mountains - Summit Relocations - The Welsh P15s

Maes Llwyn (SH 435 920) - 3rd summit relocation

Significant Height Revisions post for Maes Llwyn

Significant Name Changes post for Maes Llwyn

 

There has been a Summit Relocation 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 Maes Llwyn (SH 435 920)

The criteria for the list that this summit relocation 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 name the hill is listed by is Maes Llwyn and this was derived from the Tithe map and it is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the coast to its north and is encircled by minor roads with the B5111 road and the A5025 road farther to its north and also east, and has the town of Amlwch towards the north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed with 25m of drop, based on the 77m summit spot height positioned at SH 43598 92043 on or near to a covered reservoir, that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map and the 52m bwlch spot height that appears on the Ordnance Survey 1:50,000 Landranger map. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.  

LIDAR summit image of Maes Llwyn (SH 435 920)

The height produced by LIDAR analysis to a remaining natural summit is 74.0m and is positioned at SH 43593 92022, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are: 

The term Summit Relocations applies when the hill’s high point is found to be positioned; in a different field, within a different map contour, to a different feature such as in a conifer plantation, to a different point where a number of potential summit positions are within close proximity, a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist, or when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary that is judged to be a relatively recent man-made construct. 

Therefore, the summit height produced by LIDAR analysis is 74.0m and this is positioned at SH 43593 92022, this position is not given a spot height on contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps, and is approximately 20 metres southward from where the 77m spot height appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Maes Llwyn 

OS 1:50,000 map:  114

Summit Height:  74.0m (LIDAR) 

Summit Grid Reference (New Position):  SH 43593 92022 (LIDAR) 

Bwlch Height:  54.9m (LIDAR) 

Bwlch Grid Reference:  SH 43658 91747 (LIDAR) 

Drop:  19.1m (LIDAR) 

 

Myrddyn Phillips (September 2021)

 

Mapping Mountains - Summit Relocations - The Welsh P15s

Pen Ucheldref (SH 349 882) - 2nd summit relocation

Significant Height Revisions post for Pen Ucheldref

Significant Name Changes post for Pen Ucheldref

 

There has been a Summit Relocation 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 detail on contemporary maps produced from Ordnance Survey data and LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Pen Ucheldref (SH 349 882)

The criteria for the list that this summit relocation 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 name the hill is listed by is Pen Ucheldref and this was derived from the Tithe map, and it is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with two minor roads beside its summit and the A5025 road to its north-west, and has the village of Llanrhuddlad also towards the north-west. 

When the listing that became known as The Welsh P15s was being compiled, this hill was listed with an estimated c 23m of drop, based on an estimated c 90m summit height positioned at SH 34812 87943 and an estimated c 67m bwlch height, with both heights based on interpolation of 5m contouring that appears on the Ordnance Survey 1:25,000 Explorer map, with the 85m upper summit contour mistaken for 90m. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

The summit height produced by LIDAR analysis is 85.4m and is positioned at SH 34917 88259, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are: 

The term Summit Relocations applies when the hill’s high point is found to be positioned; in a different field, within a different map contour, to a different feature such as in a conifer plantation, to a different point where a number of potential summit positions are within close proximity, a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist, or when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary that is judged to be a relatively recent man-made construct. 

Therefore, the summit height produced by LIDAR analysis is 85.4m and this is positioned at SH 34917 88259, this position is given an 85m spot height on contemporary Ordnance Survey 1:50,000 Landranger maps and an 84m spot height on contemporary Ordnance Survey 1:25,000 Explorer maps, and is approximately 320 metres northward from where the previously listed summit is positioned. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Pen Ucheldref 

OS 1:50,000 map:  114

Summit Height:  85.4m (LIDAR) 

Summit Grid Reference (New Position):  SH 34917 88259 (LIDAR) 

Bwlch Height:  c 67m (interpolation) 

Bwlch Grid Reference:  SH 35183 88544 (interpolation) 

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

 

Myrddyn Phillips (August 2021)

Mapping Mountains - Summit Relocations - The Welsh P15s

Cae Bryn Celli Wen (SH 513 701) - 1st summit relocation

Significant Name Changes post for Cae Bryn Celli Wen

 

There has been a Summit Relocation 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 Bryn Celli Wen (SH 513 701)

The criteria for the list that this summit relocation 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 name the hill is listed by is Cae Bryn Celli Wen and this was derived from the Tithe map, and it is adjoined to the Ynys Môn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the A5 and A55 roads to its north, minor roads to its north-west and south-west and the A4080 road to its east, and has the village of Llanfair Pwllgwyngyll towards the north-east. 

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main P15 list with an estimated c 17m of drop, based on an estimated c 51m summit height positioned at SH 51467 70268 and a 34m bwlch height based on the spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map. 

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

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Cae Bryn Celli Wen

The summit height produced by LIDAR analysis is 51.3m and is positioned at SH 51314 70143, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are: 

The term Summit Relocations applies when the hill’s high point is found to be positioned; in a different field, to a different feature such as in a conifer plantation, placed within a different map contour, to a different point where a number of potential summit positions are within close proximity, or when natural ground or the natural and intact summit of a hill is confirmed compared to a higher point such as a raised field boundary that is judged to be a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist. 

Therefore, the summit height produced by LIDAR analysis is 51.3m and this is positioned at SH 51314 70143, this position is not given a spot height on contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps, and is approximately 150 metres south-westward from where the previously listed summit is positioned. 

 

The full details for the hill are: 

Group:  Ynys Môn 

Name:  Cae Bryn Celli Wen 

OS 1:50,000 map:  114, 115

Summit Height:  51.3m (LIDAR) 

Summit Grid Reference (New Position):  SH 51314 70143 (LIDAR) 

Bwlch Height:  33.3m (LIDAR) 

Bwlch Grid Reference:  SH 51742 69854 (LIDAR) 

Drop:  18.0m (LIDAR) 

 

Myrddyn Phillips (May 2021)