Mapping Mountains – Significant Name Changes – The Fours – The 400m Hills of England

Disgwylfa (SO 172 841)

There has been a Significant Name Change to a hill that is listed in The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Disgwylfa (SO 172 841)

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

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The hill is adjoined to the Cilfaesty group of hills, which are situated adjoined to the Welsh border, and it is positioned with the B4368 road to its north, and minor roads to its west and east, and has the town of Ceri towards the north north-west.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was provisionally listed under the name of Bettws Hill Wood, which is a prominent name that appears near its summit on the Ordnance Survey 1:25,000 Explorer map, with an estimated c 15m of drop, based on the 427m summit spot height positioned at SO 17503 84053 that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 412m col height, based on interpolation of 10m contouring between 410m – 420m. 

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

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

The One-Inch ‘Old Series’ map was the first map that Ordnance Survey produced, and their publication culminated from the whole of Britain being surveyed between 1791 and 1874 and the detail gathered therein produced at a scale of one inch to the mile and published in sheet format between 1805 and 1874.  The One-Inch ‘Old Series’ maps for the whole of Wales are now available online; they are also available in map format as enlarged and re-projected versions to match the scale and dimensions of the Ordnance Survey 1:50,000 Landranger series and are published by Cassini.  This series of maps form another important part in the study of upland place-names and bridge the timeframe leading up to the production of the Ordnance Survey base map of the Six-Inch series, and importantly for this hill and its listed name, it is this map that places the name Disgwylfa adjacent to the summit of this hill. 

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

Therefore, the name this hill is now listed by in The Fours – The 400m Hills of England is Disgwylfa, and this was derived from the Ordnance Survey One-Inch ‘Old Series’ map. 

 

The full details for the hill are:

Group:  Cilfaesty

Name:  Disgwylfa

Previously Listed Name:  Bettws Hill Wood

OS 1:50,000 map:  136

Summit Height:  428.9m (LIDAR)

Summit Grid Reference:  SO 17246 84195 (LIDAR)

Col Height:  410.9m (LIDAR)

Col Grid Reference:  SO 17775 83941 (LIDAR)

Drop:  18.0m (LIDAR)

 

Myrddyn Phillips and Aled Williams (March 2026) 

Mapping Mountains – Significant Name Changes – The Fours – The 400m Hills of England

Burton Howe (NZ 607 032) 

There has been a Significant Name Change based on a summit relocation to a hill that is listed in the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Burton Howe (NZ 607 032) 

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

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The hill is adjoined to the Urra Moor group of hills, which are situated in the North York Moors of north-eastern England, and it is positioned with minor roads to its north and east, and the B1257 road to its west, and has the town of Stokesley towards the north-west.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed under the name of Greenhow Moor with 17m of drop, based on the 432m summit spot height positioned at NZ 61114 02607 and the 415m col spot height that appear 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 432.3m positioned at NZ 60792 03254, with LIDAR giving its originally listed summit position as 432.2m positioned at NZ 61049 02611 and NZ 61062 02608 and NZ 61063 02601 and NZ 61063 02599 and NZ 61080 02598.

Therefore, the name this hill is now listed by in The Fours - The 400m Hills of England is Burton Howe and this was instigated from a summit relocation. 

 

The full details for the hill are:

Group:  Urra Moor

Name:  Burton Howe

Previously Listed Name:  Greenhow Moor

OS 1:50,000 map:  94

Summit Height:  432.3m (LIDAR)

Summit Grid Reference:  NZ 60792 03254 (LIDAR)

Col Height:  415.4m (LIDAR)

Col Grid Reference:  NZ 62245 02507 (LIDAR)

Drop:  16.9m (LIDAR)

 

Myrddyn Phillips and Aled Williams (February 2026) 

Mapping Mountains – Significant Name Changes – The Fours – The 400m Hills of England

 

Brand Side (SK 041 687) 

There has been a Significant Name Change to a hill that has been excluded from the listing of the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Brand Side (SK 041 687)

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

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The hill is adjoined to the Axe Edge group of hills, which are situated in the Peak District, and it is positioned with minor roads to its north, west and east, and the A53 road farther to its west, and has the town of Buxton towards the north north-east.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed under the point (Pt. 448m) notation with an estimated c 15m of drop, based on the 448m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 433m col height, based on interpolation of 5m contouring between 430m – 435m. 

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

Since the compilation of this list there have been a number of maps made available online.  Some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website.  Whilst others were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites, and it is the series of Ordnance Survey Six-Inch maps that form the basis of the change in the listed name of this hill.

The Ordnance Survey series of Six-Inch maps formed the base map Ordnance Survey used for many decades leading to the production of the 1:10,000 Series of maps, both have now been superseded by the digitised Master Map.  The series of Six-Inch maps are excellent for name placement and especially so compared to the contemporary Ordnance Survey 1:25,000 Explorer map, and it is the series of Six-Inch maps that position the name of Brand Side adjacent to land where the summit of this hill is situated.

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by is Brand Side and this was derived from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are:

Group:  Axe Edge

Name:  Brand Side

Previously Listed Name:  Pt. 448m

OS 1:50,000 map:  119

Summit Height:  447.7m (LIDAR)

Summit Grid Reference:  SK 04171 68737 (LIDAR)

Col Height:  433.4m (LIDAR)

Col Grid Reference:  SK 03870 69471 (LIDAR)

Drop:  14.3m (LIDAR)

 

Myrddyn Phillips and Aled Williams (December 2025) 

Mapping Mountains – Significant Name Changes – The Fours – The 400m Hills of England

 

Duckpit (SE 030 089) 

There has been a Significant Name Change to a hill that has been excluded from the listing of the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Duckpit (SE 030 089)

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

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The hill is adjoined to the Bleaklow Head group of hills, which are situated in the Peak District, and it is positioned with a minor road to its north and south-west, the A62 road to its north-west and the A635 road to its south, and has the village of Marsden towards the north-east.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed under the name of Rocher Moss, which is a prominent name that appears to the west south-west of the summit on the contemporary Ordnance Survey 1:25,000 Explorer map, and with an estimated c 15m of drop, based on the 418m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and an estimated c 403m col height, based on interpolation of 10m contouring between 400m – 410m. 

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

Since the compilation of this list there have been a number of maps made available online.  Some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website.  Whilst others were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites, and it is the series of Ordnance Survey Six-Inch maps that form the basis of the change in the listed name of this hill.

The Ordnance Survey series of Six-Inch maps formed the base map Ordnance Survey used for many decades leading to the production of the 1:10,000 Series of maps, both have now been superseded by the digitised Master Map.  The series of Six-Inch maps are excellent for name placement and especially so compared to the contemporary Ordnance Survey 1:25,000 Explorer map, and it is the series of Six-Inch maps that position the name of Duckpit adjacent to land where the summit of this hill is situated.

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by is Duckpit and this was derived from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are:

Group:  Bleaklow Head

Name:  Duckpit

Previously Listed Name:  Rocher Moss

OS 1:50,000 map:  110

Summit Height:  421.0m (LIDAR)

Summit Grid Reference:  SE 03044 08998 (LIDAR)

Col Height:  407.4m (LIDAR)

Col Grid Reference:  SE 03342 08562 (LIDAR)

Drop:  13.7m (LIDAR)

 

Myrddyn Phillips and Aled Williams (November 2025)

 

 

Mapping Mountains – Significant Name Changes – The Fours – The 400m Hills of England

Copperthwaite Moor (SE 053 999) 

There has been a Significant Name Change to a hill that is listed in the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Copperthwaite Moor (SE 053 999)

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

The Fours – The 400m Hills of England - English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list is a sub list entitled the Sub-Fours, the criteria for which are all English hills at or above 400m and below 500m in height that have 15m or more and below 30m of drop.  The list is co-authored by Myrddyn Phillips and Aled Williams and is available to download in Google Doc format from the Mapping Mountains site.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The hill is adjoined to the Great Shunner Fell group of hills, which are situated in the English Pennines, and it is positioned with minor roads to its north-east, west and south-east, and the B6270 road farther to its south, and has the village of Reeth towards the west south-west.

When the Introduction to the first group of hills for the updated and revised listing of the The Fours – The 400m Hills of England was published by Mapping Mountains on the 10^th September 2022, it was announced that the accompanying sub lists were being revised with the two 390m categories dispensed with and the criteria and name of the 400m Sub-Fours revised.  The one accompanying sub list is now named the Sub-Fours with its criteria being all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.

Prior to this revision this hill was listed as Fremington Edge with 17m of drop, based on the twin 435m summit spot heights positioned at SE 05216 99905 that appears on the Ordnance Survey 1:25,000 Explorer map and positioned at NZ 05189 00016 that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and the 418m col 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 435.5m positioned at NZ 05203 00071.  The hill was therefore listed under the name of Fremington Edge with these details given for the summit position and height when the revised list including P15 subs was subsequently published.

After these details became publicly available Ronnie Bowron sent communication that the listed summit was to a spoil heap with the track of a recent walk over these high points and a photo of the spoil heap attached and that the locally known name for the hill is Copperthwaite Moor.  Ronnie explained that he knows this area very well, and as a teenager used to go to scout camp directly below the edge; the edge being Fremington Edge which is a prominent feature of this hill.

Since the original publication of this list there have been a number of maps made available online.  Some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website.  Whilst others were digitally updated such as the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.

One of the mapping resources now available online is the WalkLakes website which hosts an interactive map originated from the Ordnance Survey Open Data programme.  And although the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map do not record the specific name of Copperthwaite Moor, the WalkLakes map does. 

Extract from the interactive mapping hosted on the WalkLakes website

Therefore, the name this hill is now listed by in The Fours - The 400m Hills of England is Copperthwaite Moor and this was derived from Ronnie Bowron, with the name also recorded on the WalkLakes interactive map. 

 

The full details for the hill are:

Group:  Great Shunner Fell

Name:  Copperthwaite Moor

Previously Listed Name:  Fremington Edge 

OS 1:50,000 map:  98

Summit Height:  435.3m (LIDAR)

Summit Grid Reference:  SE 05322 99936 (LIDAR)

Col Height:  419.3m (LIDAR)

Col Grid Reference:  NZ 04714 00426 (LIDAR)

Drop:  16.0m (LIDAR)

 

Thanks to Ronnie Bowron for details relating to the listed name of this hill

Myrddyn Phillips and Aled Williams (October 2025)