Myrddyn Phillips - Mapping Mountains: Mapping Mountains – Hill Reclassifications – The 500-Metre Tops of England and Wales

Thursday 15 October 2020

Mapping Mountains – Hill Reclassifications – The 500-Metre Tops of England and Wales – Deweys

The 500-Metre Tops of England and Wales – Deweys – Hill Reclassifications

The 500-Metre Tops of England and Wales are affectionately known after their hill list compiler; Michael Dewey. This list mixes metric and imperial height in its criteria to bookend up to the 2000ft height band and takes in all hills in England, Isle of Man and Wales that are 500m and above and below 2000ft (609.6m) in height that have 30m minimum drop.

This list was first published in 1995 and formed one of many lists that appeared in the Mountain tables book published by Constable. At the time of publication 373 hills were listed with 164 in England, 5 in the Isle of Man and 204 in Wales.

The Deweys have undergone extensive revision since first publication with over 90 reclassifications to the list. Many people have contributed toward these, however there are only five people associated with ten or more reclassifications; Myrddyn Phillips, David Purchase, Rob Woodall, John Barnard and Graham Jackson.

The posts that have appeared on Mapping Mountains detailing the hill reclassifications specifically for this list appear below presented chronologically in receding order.

Postscript: Michael Dewey died on the 5^th November 2022. His wife; Gillian wished for this list to be carried on and made provision for it to be co-authored by Myrddyn Phillips. Michael will always be the compiler and originator, it’s just that he’s now got a co-author to safeguard and carry this list on. Hopefully this list will retain the name of the Deweys; an affectionate moniker given it by hill baggers, as this is an appropriate testament to what Michael created and a legacy to remember Michael by.

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Foel y Geifr (SH 716 050) – Dewey deletion (66th reclassification)

This is one in a series of Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys. These posts tie in with a ChangeRegister giving detail to this list and its alterations since publication in the Mountain tables book.

Foel y Geifr (SH 716 050)

This list formed one of a number of lists that appeared in the Mountain tables book published by Constable in 1995 and at the time of publication comprised 373 hills with 164 in England, 5 in the Isle of Man and 204 in Wales. The Deweys have undergone extensive revision since first publication with the initial stages forming the basis of this revision given below:

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

29^th June 2000 Possible/Probable 500’s by Michael Dewey listing 77 hills. Michael adopts following protocol; if one person proposes that a top should qualify as a 500 by personal survey, and is then confirmed by a second person, it should then be promoted to the main list.

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill is listed by in the Deweys is Foel y Geifr, and it is adjoined to the Cadair Idris group of hills which are situated in the south-western part of North Wales, and it is positioned with the B4405 road to its north-west, the A493 road to its south and the A487 road to its east, and has the town of Machynlleth towards the south-east.

This hill was not included in the original 1995 Constable publication, but with a 515m summit spot height and bwlch contouring between 480m – 490m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by Myrddyn Phillips who then conducted a basic levelling survey of this hill on the 26^th June 2000, resulting in over 30m of drop. These details were forwarded to the list author; Michael Dewey and the hill was added to the list with the date of survey given in the Remarks column accompanying the list.

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 Foel y Geifr (SH 716 050)

Therefore, the deletion of this hill from the The 500-Metre Tops of England and Wales list was instigated on the 26^th May 2023 and is due to LIDAR analysis first reported by the DoBIH team based on detail produced by Joe Nuttall in his surface analysis programme, resulting in a 515.6m summit height and a 486.8m bwlch height, with these values giving this hill 28.8m of drop, which is insufficient for it to be classified as a Dewey.

The full details for the hill are:

Name: Foel y Geifr

OS 1:50,000 map: 124

OS 1:25,000 map: 23

Summit Height: 515.6m (LIDAR)

Summit Grid Reference: SH 71634 05092 (LIDAR)

Bwlch Height: 486.8m (LIDAR)

Bwlch Grid Reference: SH 71726 05403 (LIDAR)

Drop: 28.8m (LIDAR)

Myrddyn Phillips (July 2023)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Meal Fell (NY 282 337) – Dewey deletion (65th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys. These posts tie in with a Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

LIDAR image of Meal Fell (NY 282 337)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Meal Fell, and it is adjoined to the Skiddaw group of hills which are situated in the Lake District in England, and it is positioned with the B5299 road to its north, the A591 road to its west and the A66 road to its south, and has the town of Keswick towards the south.

This hill was not included in the original 1995 Constable publication, but with a 550m summit spot height and col contouring between 520m – 530m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey as the 0pposing 520m ring contours are extremely close together.

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

The above detail was noted by Rob Woodall and Myrddyn Phillips who worked independently but also exchanged all data, with Rob assessing the hill’s qualification on site on the 14^th November 2000. These details were forwarded to Michael Dewey and the hill was added to the list on the 19^th November 2000.

LIDAR image of Meal Fell (NY 282 337)

Therefore, the deletion of this hill from the The 500-Metre Tops of England and Wales list was instigated on the 29^th December 2022 and is due to LIDAR analysis conducted by Myrddyn Phillips, with this previously deduced by the DoBIH team, resulting in a 549.4m summit height and a 520.1m col height, with these values giving this hill 29.3m of drop, which is insufficient for it to be classified as a Dewey.

The full details for the hill are:

Name: Meal Fell

OS 1:50,000 map: 89, 90

OS 1:25,000 map: 4

Summit Height: 549.4m (LIDAR)

Summit Grid Reference: NY 28299 33762 (LIDAR)

Col Height: 520.1m (LIDAR)

Col Grid Reference: NY 28565 33765 (LIDAR)

Drop: 29.3m (LIDAR)

Myrddyn Phillips (February 2023)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Y Drum (SJ 082 378) – Dewey addition (64th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Y Drum (SJ 082 378)

This list formed one of a number of lists that appeared in the Mountain tables book published by Constable in 1995 and at the time of publication comprised 373 hills with 164 in England, 5 in the Isle of Man and 204 in Wales. The Deweys have undergone extensive revision since first publication with the initial stages forming the basis of this revision given below:

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Y Drum, and it is adjoined to the Y Berwyn group of hills, which are situated in the south-eastern part of north Wales, and it is positioned with the A5 road to its north and the B4401 road to its west, and has the village of Cynwyd towards the north-west.

This hill was not included in the original 1995 Constable publication, as with a 579m summit spot height and a 551m bwlch spot height that appear on the Ordnance Survey 1:25,000 Explorer map it was accepted that the hill had under 30m of drop.

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

Since the 1995 publication of this list by Constable there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the mapping on the OS Maps website. This is the replacement for OS Get-a-map and it used to have contours at 5m intervals which proved consistently more accurate compared to the 5m contours that sometimes appear on Ordnance Survey 1:25,000 Explorer maps and used to appear on the online Vector Map Local. This mapping had bwlch contouring between 545m – 550m, with interpolation giving an estimated bwlch height of c 549m and therefore an estimated c 30m of drop.

With this newly acquired information the hill was prioritised for a GNSS survey and this took place on the 26^th November 2020. The summit and bwlch of this hill were surveyed by Myrddyn Phillips with Aled Williams and Mark Trengove assisting, using a Trimble GeoXH 6000 resulting in a 579.1m summit height and a 549.0m bwlch height, with these values giving this hill 30.1m of drop.

The Trimble GeoXH 6000 gathering data at the bwlch of Y Drum

The Trimble GeoXH 6000 gathering data at the summit of Y Drum

These details were forwarded to the list author; Michael Dewey and the hill was subsequently added to his list on 28^th November 2020.

The full details for the hill are:

Name: Y Drum

OS 1:50,000 map: 125

OS 1:25,000 map: 255

Summit Height: 579.1m (converted to OSGM15)

Summit Grid Reference: SJ 08247 37893

Bwlch Height: 549.0m (converted to OSGM15)

Bwlch Grid Reference: SJ 08003 38256

Drop: 30.1m

Myrddyn Phillips (June 2021)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Cefn Cyfarwydd (SH 752 630) – Dewey addition (63rd reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Cefn Cyfarwydd (SH 752 630)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Cefn Cyfarwydd, and it is adjoined to the Carneddau group of hills which are situated in the north—western part of north Wales, and it is positioned with a minor road to its north and south-east, and farther afield has the B5106 and the A470 roads to its east, and has the village of Trefriw towards the east and the town of Llanrwst towards the east south-east.

This hill was not included in the original 1995 Constable publication, as with a 503m summit spot height and a 477m bwlch spot height that appear on the Ordnance Survey 1:25,000 Explorer map it was accepted that the hill had under 30m of drop.

Extract from the Ordnance Survey 1:25000 Explorer map

Since the 1995 publication of this list by Constable there have been a number of Ordnance Survey maps made available online, some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website, whilst others are current and digitally updated such as the mapping on the OS Maps website. This is the replacement for OS Get-a-map and has contours at 5m intervals which are proving consistently more accurate compared to the 5m contours that sometimes appear on Ordnance Survey 1:25,000 Explorer maps and used to appear on the online Vector Map Local. This mapping shows the 477m bwlch spot height to be positioned on a separate 475m contour ring implying that the height of this hill’s bwlch is substantially lower than 477m, with interpolation based on this contouring giving the hill an estimated c 30m of drop.

Extract from the OS Maps website

With this newly acquired information the hill was prioritised for a GNSS survey and this took place on the 17^th February 2019. The summit and bwlch of this hill were surveyed by Myrddyn Phillips and Aled Williams using a Trimble GeoXH 6000 resulting in a 501.7m summit height and a 471.0m bwlch height, with these values giving this hill 30.7m of drop.

The Trimble GeoXH 6000 gathering data at the summit of Cefn Cyfarwydd

The Trimble GeoXH 6000 gathering data at the bwlch of Cefn Cyfarwydd

These details were forwarded to the list author; Michael Dewey and the hill was subsequently added to his list on 19^th February 2019.

The full details for the hill are:

Name: Cefn Cyfarwydd

OS 1:50,000 map: 115

OS 1:25,000 map: 17

Summit Height: 501.7m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference: SH 75201 63067 (Trimble GeoXH 6000)

Bwlch Height: 471.0m (converted to OSGM15, Trimble GeoXH 6000)

Bwlch Grid Reference: SH 74708 62751 (Trimble GeoXH 6000)

Drop: 30.7m (Trimble GeoXH 6000)

Myrddyn Phillips (October 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Twynwalter (SN 828 175) – Dewey deletion (62nd reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

LIDAR image of Twynwalter (SN 828 175)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountaintables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Twynwalter, and it is adjoined to the Mynydd Du group of hills in the Brecon Beacons which are situated in south Wales, and it is positioned with the A4067 road to its east and south, and has the hamlet of Glyntawe towards the south-east and the village of Abercraf towards the south.

This hill was included in the original 1995 Constable publication, and listed with a 509m summit height which appears as a spot height on Ordnance Survey 1:25,000 Explorer maps and the Outdoor Leisure maps of the day. Its drop value was later given as an estimated c 32m with its bwlch height an estimated c 477m based on interpolation of 10m contouring between 470m – 480m.

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

As the listed drop value was near the minimum 30m required for qualification to this list the hill was prioritised for a GNSS survey and this took place on the 10^th July 2014. The summit of this hill was surveyed by Myrddyn Phillips using a Trimble GeoXH 6000. However, this was the last of many surveys conducted during the day that included visiting the remotest spot in mainland Wales as well as one of the remotest hills in Wales and lack of daylight hours dictated that only the summit could be surveyed. The survey resulted in a 502.1m summit height, which is 6.9m lower than the 509m spot height on the Ordnance Survey 1:25,000 Explorer map.

The Trimble GeoXH 6000 gathering data at the summit of Twynwalter (SN 828 175)

However, it was not until LIDAR became available that the details for the bwlch of 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 bwlch image of Twynwalter

The summit and bwlch heights for this hill were subsequently ascertained from LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips, resulting in a bwlch height of 475.9m and when coupled with the 502.1m summit height from the Trimble GeoXH 6000 survey this gives the hill 26.25m of drop.

These details were forwarded to the list author; Michael Dewey and the hill was subsequently deleted from his list on 19^th February 2019.

The full details for the hill are:

Name: Twynwalter

OS 1:50,000 map: 160

OS 1:25,000 map: 12

Summit Height: 502.1m (converted to OSGM15, Trimble GeoXH 6000)

Summit Grid Reference: SN 82837 17506 (Trimble GeoXH 6000)

Bwlch Height: 475.9m (LIDAR)

Bwlch Grid Reference: SN 82597 17917 (LIDAR)

Drop: 26.25m (Trimble GeoXH 6000 summit and LIDAR bwlch)

Myrddyn Phillips (October 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Calf Top (SD 664 856) – Dewey deletion (61st reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Calf Top (SD 664 856)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill is listed by in the Deweys is Calf Top, and it is adjoined to the Ingleborough group of hills which are situated in the central Pennines of northern England, and it is positioned with the A683 and the M6 roads to its west, and has the small town of Sedbergh towards the north and the small community of Barbon towards the south-west.

This hill was included in the original 1995 Constable publication and listed with a 609m summit height which is adjoined to a triangulation pillar given the flush bracket height of 609.600m in the OS Trig Database, and which appears as a spot height on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps.

As its 609m summit spot height was near the benchmark height of 2000ft (609.6m) it was prioritised for a GNSS survey and this took place on the 15^th April 2010. The summit of this hill was surveyed by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530 with two hours of data gathered, resulting in a summit height at the time of 609.61m.

Gathering data during the first Leica 530 survey of Calf Top

As this result was so close to the benchmark height of 2000ft (609.6m) it was decided to re-visit and gather a further four hours of data. The second survey was conducted on the 20th May 2010 by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530, resulting in a summit height at that time of 609.62m. As the results from these surveys were so close to the 2000ft / 609.6m height the two data sets were sent to Ordnance Survey and were processed using their Bernese software, resulting in a summit height of 609.58m.

Gathering data during the second Leica 530 survey of Calf Top

This result was re-assessed in August 2016 when Ordnance Survey adopted their new OSTN15 / OSGM15 model which replaced their OSTN02 / OSGM02 model. The adoption of the OSTN15 / OSGM15 model increased the known height of hills in England by an average of 2cm - 4cm, and in the case of Calf Top this resulted in its known accurate height increasing to 609.61m, which is higher than the maximum 2000ft (609.6m) height for Dewey status.

These details were forwarded to the list author; Michael Dewey and the hill was deleted from his list in September 2016.

The full details for the hill are:

Name: Calf Top

OS 1:50,000 map: 98

OS 1:25,000 map: 2

Summit Height: 609.61m (converted to OSGM15, Leica 530)

Summit Grid Reference: SD 66450 85624 (Leica 530)

Col Height: c 289m (interpolation)

Col Grid Reference: SD 68178 86259 (interpolation)

Drop: c 321m (Leica 530 summit and interpolated col)

Myrddyn Phillips (October 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Thack Moor (NY 611 462) – Dewey deletion (60th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Thack Moor (NY 611 462)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Thack Moor, and it is adjoined to the Black Fell group of hills which are situated in the northern Pennines of England, and it is positioned with the A686 road to its south-east and the A689 road to its north-east, and has the small town of Alston towards the east and the small community of Renwick towards the south south-west.

As its 609m summit spot height was near the benchmark height of 2000ft (609.6m) it was prioritised for a GNSS survey and this took place on the 22^nd August 2012. The summit of this hill was surveyed by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530 with two hours of data gathered, resulting in a summit height at the time of 609.645m.

The first Leica 530 survey of Thack Moor

As this result was so close to the benchmark height of 2000ft (609.6m) it was decided to re-visit and gather a further four hours of data. The second survey was conducted on the 3^rd March 2013 by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica GS15, with Bob Smith editor of the Grough website joining us to write a feature on the survey, and by Aled Williams who also joined us on the summit. The survey result at that time came to 609.625m which when converted using OSGM15 resulted in a summit height of 609.65m, which is higher than the maximum 2000ft (609.6m) height for Dewey status.

The second Leica GS15 survey of Thack Moor

These details were forwarded to the list author; Michael Dewey and the hill was deleted from his list in April 2013.

The full details for the hill are:

Name: Thack Moor

OS 1:50,000 map: 86

OS 1:25,000 map: 31

Summit Height: 609.65m (converted to OSGM15, Leica GS15)

Summit Grid Reference: SN 61166 46278 (Leica GS15)

Col Height: c 549m (interpolation)

Col Grid Reference: NY 63681 45681 (interpolation)

Drop: c 61m (Leica GS15 summit and interpolated col)

Myrddyn Phillips (October 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Watch Hill (NY 624 460) – Dewey deletion (59th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Watch Hill (NY 624 460)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Watch Hill, and it is adjoined to the Black Fell group of hills which are situated in the northern Pennines of England, and it is positioned with the B6413 road to its west, the A686 road to its south-east and the A689 road to its north-east, and has the village of Renwick towards the south-west.

This hill was not included in the original 1995 Constable publication, but with a 602m summit spot height and col contouring between 570m – 580m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be considered a potential new Dewey.

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

The above detail was noted by David Purchase who assessed the hill’s qualification on site. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 28^th July 2001.

Since the inclusion of this hill in the Dewey list the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map became available online. This mapping had many spot heights not on other publicly available Ordnance Survey maps and gave a 574m spot height on the area of this hill’s col, and when coupled with the 602m summit spot height these values gave this hill 29m of drop.

As the drop value for this hill was near the minimum 30m qualifying mark, this hill was prioritised for a line survey which was conducted by John Barnard, Graham Jackson and Myrddyn Phillips on the 22^nd August 2012, resulting in 29.0m of drop and this hill’s subsequent deletion from Dewey status.

The full details for the hill are:

Name: Watch Hill

OS 1:50,000 map: 86

OS 1:25,000 map: 31

Summit Height: 603m (relative to 602m spot height)

Summit Grid Reference: NY 62495 46038 (hand-held GPS during line survey)

Col Height: 574m (spot height and relative to 602m spot height and line surveyed drop)

Col Grid Reference: NY 62090 45937 (hand-held GPS during line survey)

Drop: 29.0m (level and staff line survey)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Kirkby Fell (SD 873 635) – Dewey addition (58th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

LIDAR image of Kirkby Fell (SD 873 635)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Kirkby Fell, and it is adjoined to the Ingleborough group of hills which are situated in the Yorkshire Dales in England, and it is encircled by minor roads with the A65 further afield to its west, and has the town of Settle towards the west.

This hill was not included in the original 1995 Constable publication, but with a 546m summit spot height and col contouring between 510m – 520m that appear on the Ordnance Survey 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey. The above detail was noted by Myrddyn Phillips, but the hill at this stage was not elevated to the ranks of Deweys.

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

As the interpolated drop value of this hill was close to the minimum qualifying mark of 30m it was prioritised for a GNSS survey, and this took place on the 10^th April 2011. The summit and col of this hill were surveyed by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530, with assistance from Brent Lynam and Mark Trengove, resulting in a 546.45m summit height and a 515.3m col height, with these values giving this hill 31.15m of drop, and once the list author; Michael Dewey, was informed it was added to his list.

The summit of Kirkby Fell

With the advent of LIDAR the details for this hill have been 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 col image for Kirkby Fell

The summit and col height for this hill were subsequently ascertained from LIDAR analysis conducted by Myrddyn Phillips, resulting in a 546.35m summit height and a 515.4m col height, with the latter positioned at SD 87193 63756, which is 54 metres from where the col position was documented during the Leica 530 survey. However, the LIDAR result does not change this hill’s Dewey status as the drop value comes to 30.9m.

The full details for the hill are:

Name: Kirkby Fell

OS 1:50,000 map: 98

OS 1:25,000 map: 2, 41

Summit Height: 546.45m (converted to OSGM15, Leica 530)

Summit Grid Reference: SD 87381 63531 (hand-held GPS during survey)

Col Height: 515.3m (converted to OSGM15, Leica 530)

Col Grid Reference: SN 97191 63810 (Leica 530)

Drop: 31.15m (Leica 530)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Hand Lake (NY 647 006) – Dewey deletion (57th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Hand Lake, and it is adjoined to the Howgill Fells in the Great Shunner group of hills which are situated in the Yorkshire Dales in England, and it is positioned with the A685 road to its north, the M6 motorway to its west and the A683 road to its east, and has the town of Sedbergh towards the south.

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

This hill was not included in the original 1995 Constable publication, but with a small uppermost 500m ring contour almost hidden behind the ‘e’ of the word Lake and col contouring between 450m – 460m that appear on the Ordnance Survey 1:25,000 Explorer map, this hill was above 500m in height and had a minimum of 30m of drop according to Ordnance Survey maps of the day and therefore was an automatic entry to the listing of Deweys.

The small 500m ring contour still appears on contemporary Ordnance Survey 1:25,000 Explorer maps almost hidden behind the 'e' of the word Lake

The above detail was noted by E. D. ‘Clem’ Clements and once these details were forwarded to the list author; Michael Dewey, the hill was added to the list on the 8^th November 2001.

As the listed summit height was the minimum required for qualification to Dewey status this hill was prioritised for a GNSS survey and this took place on the 24^th November 2010. The summit of this hill was surveyed by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530 with 60 minutes of data gathered. The survey resulted in a 499.7m summit height and as this is below 500m this hill was subsequently deleted from the list of Deweys.

The Leica 530 gathering data at the summit of Hand Lake

However, it was not until LIDAR became available that the details for the col of 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 Hand Lake (NY 647 006)

The summit and col heights for this hill were subsequently ascertained from LIDAR analysis conducted by Myrddyn Phillips, resulting in the summit height and position matching that produced by the Leica 530 and a 458.9m col height, with these values giving this hill 40.8m of drop.

The full details for the hill are:

Name: Hand Lake

OS 1:50,000 map: 91

OS 1:25,000 map: 19

Summit Height: 499.7m (converted to OSGM15, Leica 530)

Summit Grid Reference: NY 64726 00610 (Leica 530)

Col Height: 458.9m (LIDAR)

Col Grid Reference: NY 64952 00223 (LIDAR)

Drop: 40.8m (Leica 530 summit and LIDAR col)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Cerrig yr Ieirch (SH 758 425) – Dewey deletion (56th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Cerrig yr Ieirch (SH 758 425)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Cerrig yr Ieirch, and it is adjoined to the Arenig group of hills which are situated in the central part of north Wales, and it is positioned with the B4407 road to its north, the A470 road to its west and the B4391 road to its south, and has the village of Ffestiniog towards the west.

This hill was not included in the original 1995 Constable publication, but with a 513m summit spot height and bwlch contouring between 480m – 490m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps of the day, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by Myrddyn Phillips and Rob Woodall, with Rob visiting the area of this hill’s bwlch to assess its candidacy for Dewey status and surveying from the bwlch toward a prominent boundary stone close to where the Ordnance Survey place the 490m contour on their maps. The two then combined to undertake a basic levelling survey of this hill on the 27^th October 2001. This survey repeated what Rob had previously done with the measurement taken to a path just below the boundary stone to where the 490m contour is placed. With 23m then added to the result to compensate for the height difference between the 513m summit spot height and the 490m contour, resulting in 100ft / 30.5m of drop. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 2^nd November 2001.

The Leica 530 gathering data at the summit of Cerrig yr Ieirch

The Leica 530 gathering data at the bwlch of Cerrig yr Ieirch

As the result from the basic levelling survey was near the minimum 30m of drop required for qualification to Dewey status this hill was prioritised for a GNSS survey and this took place on the 27^th October 2010. The summit and bwlch of this hill were surveyed by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530 resulting in a 511.0m summit height and a 481.9m bwlch height, with these values giving this hill 29.2m of drop and its subsequent deletion from the list of Deweys.

The full details for the hill are:

Name: Cerrig yr Ieirch

OS 1:50,000 map: 124

OS 1:25,000 map: 18

Summit Height: 511.0m (converted to OSGM15, Leica 530)

Summit Grid Reference: SH 75885 42509 (Leica 530)

Bwlch Height: 481.9m (converted to OSGM15, Leica 530)

Bwlch Grid Reference: SH 77082 41384 (Leica 530)

Drop: 29.2m (Leica 530)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Linghaw (SD 637 985) – Dewey deletion (55th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Linghaw, and it is adjoined to the Howgill Fells in the Great Shunner group of hills which are situated in the Yorkshire Dales in England, and it is positioned with the A685 road to its north, the M6 motorway to its west, and the A683 road to its east, and has the town of Sedbergh towards the south south-east.

This hill was not included in the original 1995 Constable publication, but with a small uppermost 500m ring contour and col contouring between 460m – 470m that appear on the Ordnance Survey 1:25,000 Explorer map, this hill has a minimum of 30m of drop according to Ordnance Survey maps of the day and therefore was an automatic entry to the listing of Deweys.

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

Gathering data at the summit of Linghaw

Gathering data at the col of Linghaw

As the listed summit height was the minimum required for qualification to Dewey status this hill was prioritised for a GNSS survey and this took place on the 20^th October 2010. The summit and col of this hill were surveyed by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530 with 60 minutes of data gathered at the summit and 30 minutes at the col. The survey resulted in a 498.9m summit height and a 463.45m col height, with these values giving this hill 35.4m of drop. As the summit height is below 500m this hill was deleted from the list of Deweys.

The full details for the hill are:

Name: Linghaw

OS 1:50,000 map: 97

OS 1:25,000 map: 19

Summit Height: 498.9m (Leica 530)

Summit Grid Reference: SD 63763 98545 (Leica 530)

Col Height: 463.45m (Leica 530)

Col Grid Reference: SD 63963 98468 (Leica 530)

Drop: 35.4m (Leica 530)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Iwerddon (SH 688 482) – Dewey deletion (54th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Iwerddon (SH 688 482)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Iwerddon, and it is adjoined to the Moelwynion group of hills which are situated in the north-western part of north Wales, and it is positioned with the A498 road to its north-west and the A470 road to its east, and has the town of Blaenau Ffestiniog towards the south south-east.

This hill was not included in the original 1995 Constable publication, but with a 583m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and bwlch contouring between 550m – 560m on the 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by David Purchase and Myrddyn Phillips who worked independently but also exchanged all data. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 3^rd May 2000. Subsequently Myrddyn Phillips conducted a basic levelling survey of this hill on the 5^th May 2000 without prior knowledge of its recent inclusion, resulting in the hill considered to have just over 30m of drop.

Doing the sums after the level and staff line survey

As the result from the basic levelling survey was near the minimum 30m qualifying drop value, this hill was prioritised for a line survey which was conducted by John Barnard and Myrddyn Phillips on the 11^th March 2010, resulting in 25.2m of drop and this hill’s deletion from Dewey status.

The full details for the hill are:

Name: Iwerddon

OS 1:50,000 map: 115

OS 1:25,000 map: 17

Summit Height: 583m (spot height)

Summit Grid Reference: SH 68822 48217 (hand-held GPS during line survey)

Bwlch Height: 558m (relative to spot heighted summit and line surveyed drop)

Bwlch Grid Reference: SH 68409 47880 (hand-held GPS during line survey)

Drop: 25.2m (level and staff line survey)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Mynydd Graig Goch (SH 497 485) – Dewey deletion (53rd reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Mynydd Graig Goch (SH 497 485)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Mynydd Graig Goch, and it is adjoined to the Moel Hebog group of hills which are situated in the north-western part of north Wales, and it is positioned with the B4418 road to its north, the A487 road to its west and the A498 and A4085 roads to its east, and has the village of Pen-y-groes towards the north north-west.

This hill was included in the original 1995 Constable publication and listed with a 609m summit height which appeared as a spot height on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps, and latterly with an estimated c 71m of drop with an estimated bwlch height of c 539m.

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

As its 609m summit spot height was near the benchmark height of 2000ft (609.6m) it was prioritised for a GNSS survey by John Barnard who approached Leica Geosystems suggesting that a joint survey with the fledgling team of G&J Surveys could take place. Leica Geosystems were enthusiastic for this to happen and the hill was surveyed on the 11^th August 2008.

Mynydd Graig Goch was surveyed by James Whitworth of Leica Geosystems using a Leica SmartRover 1200 and two hours of data were gathered in testing conditions, resulting in a summit height at that time of 609.72m. These data were reprocessed by Ordnance Survey resulting in a summit height of 609.75m which when converted using OSGM15 results in a summit height of 609.8m, which is higher than 2000ft (609.6m) and therefore exceeds the height for Dewey classification and qualifies for that of Hewitt status.

The Leica SmartRover 1200 gathering data at the summit of Mynydd Graig Goch

These details were forwarded to the list author; Michael Dewey and the hill was deleted from the list in August 2008 and its newly acquired summit height and its ramifications was announced via a press conference on the 19^th September 2008.

The full details for the hill are:

Name: Mynydd Graig Goch

OS 1:50,000 map: 115, 123

OS 1:25,000 map: 17, 254

Summit Height: 609.8m (Leica SmartRover 1200)

Summit Grid Reference: SH 49732 48518 (Leica SmartRover 1200)

Bwlch Height: c 538 (interpolation)

Bwlch Grid Reference: SH 50960 48794 (interpolation)

Drop: c 72m (Leica SmartRover 1200 summit and interpolated bwlch)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Domen-ddu (SO 016 782) – Dewey deletion (52nd reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill was listed by in the Deweys is Domen-ddu, and it is adjoined to the Pegwn Mawr group of hills which are situated in the northern part of mid Wales, and it is positioned with the B4518 and the A470 roads to its west, the A44 road to its south and the A483 road to its east, and has the town of Llanidloes towards the north-west.

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

This hill was not included in the original 1995 Constable publication, but was added to the list in July / August 2004 due to hand-help GPS readings taken by Stephen Walker. Prior to its inclusion Myrddyn Phillips conducted a basic levelling survey of this hill with assistance from Eryl Selly and Stephen Hughes on the 19^th September 2002, resulting in 81ft / 24.7m of drop.

During the line survey of Domen-ddu

As heights produced by hand-held GPS readings have a relatively large margin of uncertainty applicable to them, this hill was prioritised for a line survey which was conducted by John Barnard, Graham Jackson, Myrddyn Phillips and David Purchase on the 30^th June 2008, resulting in 24.3m of drop and this hill’s subsequent deletion from the Dewey list.

The full details for the hill are:

Name: Domen-ddu

OS 1:50,000 map: 136, 147

OS 1:25,000 map: 214

Summit Height: 553m (spot height)

Summit Grid Reference: SO 01693 78268 (hand-held GPS during line survey)

Bwlch Height: 529m (relative to summit height and line surveyed drop)

Bwlch Grid Reference: SO 02167 79028 (hand-held GPS during line survey)

Drop: 24.3m (level and staff line survey)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Mynydd Ceiswyn (SH 772 139) – Dewey deletion (51st reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Mynydd Ceiswyn (SH 772 139)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this deletion appear below:

The name the hill is listed by in the Deweys is Mynydd Ceiswyn, and it is adjoined to the Cadair Idris group of hills which are situated in the south-western part of north Wales, and it is positioned with the A470 road to its north and east, the A487 road to its west and the A489 road to its south, and has the town of Dolgellau towards the north-west.

This hill was not included in the original 1995 Constable publication, but was added to the list on the 8^th January 2005 due to hand-help GPS readings taken by Stephen Walker. Prior to its inclusion Myrddyn Phillips conducted a basic levelling survey of this hill on the 7^th May 2000, resulting in 95ft / 29.0m of drop.

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

As heights produced by hand-held GPS readings have a relatively large margin of uncertainty applicable to them, this hill was prioritised for a line survey which was conducted by John Barnard, Graham Jackson and Myrddyn Phillips on the 3^rd November 2007, resulting in 27.4m of drop and this hill’s subsequent deletion from the Dewey list.

During the line survey of Mynydd Ceiswyn

At the summit of Mynydd Ceiswyn

The summit of this hill has now been surveyed by GNSS receiver and this was conducted by Alan Dawson on the 22^nd April 2019, using a Leica RX1250, resulting in a 604.9m summit height.

The full details for the hill are:

Name: Mynydd Ceiswyn

OS 1:50,000 map: 124

OS 1:25,000 map: 23

Summit Height: 604.9m (Leica RX1250)

Summit Grid Reference: SH 77241 13902 (Leica RX1250)

Bwlch Height: 577.4m (relative to summit height and line surveyed drop)

Bwlch Grid Reference: SH 77848 14053 (hand-held GPS during line survey)

Drop: 27.4m (level and staff line survey)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

THIS HILL HAS SUBSEQUENTLY BEEN DELETED FROM THE DEWEY LIST

Cerrig yr Ieirch (SH 758 425) – Dewey addition (50th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Cerrig yr Ieirch (SH 758 425)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Cerrig yr Ieirch, and it is adjoined to the Arenig group of hills which are situated in the central part of north Wales, and it is positioned with the B4407 road to its north, the A470 road to its west and the B4391 road to its south, and has the village of Ffestiniog towards the west.

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

This hill was not included in the original 1995 Constable publication, but with a 513m summit spot height and bwlch contouring between 480m – 490m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

At the boundary stone during the basic levelling survey

The above detail was noted by Myrddyn Phillips and Rob Woodall, with Rob visiting the area of this hill’s bwlch to assess its candidacy for Dewey status and surveying from the bwlch toward a prominent boundary stone close to where the Ordnance Survey place the 490m contour on their maps. The two then combined to undertake a basic levelling survey of this hill on the 27^th October 2001. This survey was repeated with the measurement taken to a path just below the boundary stone to where the 490m contour is placed. With 23m then added to the result to compensate for the height difference between the 513m summit spot height and the 490m contour, resulting in 100ft / 30.5m of drop. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 2^nd November 2001 (this hill has subsequently been deleted from the Dewey list).

The full details for the hill are:

Name: Cerrig yr Ieirch

OS 1:50,000 map: 124

OS 1:25,000 map: 18

Summit Height: 513m (spot height)

Summit Grid Reference: SH 75885 42509 (Leica 530)

Bwlch Height: 483m (basic levelling survey relative to summit spot height)

Bwlch Grid Reference: SH 77082 41384 (Leica 530)

Drop: 30m (basic levelling survey)

Myrddyn Phillips (September 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Craig y Benglog (SH 805 244) – Dewey addition (49th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Craig y Benglog (SH 805 244)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Craig y Benglog, and it is adjoined to the Arenig group of hills which are situated in the central part of north Wales, and it is positioned with the A470 road to its west and the A494 road to its east, and has the town of Dolgellau towards the south-west.

This hill was not included in the original 1995 Constable publication, but with an uppermost 520m ring contour and bwlch contouring between 490m – 500m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by Myrddyn Phillips, who was then joined by Rob Woodall to conduct a basic levelling survey of this hill on the 27^th October 2001, resulting in 110ft / 33.5m of drop. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 2^nd November 2001.

At the bwlch of Craig y Benglog during the GNSS survey of the hill

As this hill qualified for the Dewey list through a basic levelling survey it was prioritised for a GNSS survey, and this took place on the 26^th January 2009. The summit and bwlch of this hill were surveyed by John Barnard, Graham Jackson and Myrddyn Phillips using a Leica 530, resulting in a 525.3m summit height and a 492.7m bwlch height, with these values giving this hill 32.6m of drop, and therefore confirming its Dewey status.

The full details for the hill are:

Name: Craig y Benglog

OS 1:50,000 map: 124, 125

OS 1:25,000 map: 23

Summit Height: 525.3m (Leica 530)

Summit Grid Reference: SH 80504 24416 (Leica 530)

Bwlch Height: 492.7m (Leica 530)

Bwlch Grid Reference: SH 80428 24506 (Leica 530)

Drop: 32.6m (Leica 530)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Moel yr Wden (SH 780 356) – Dewey addition (48th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Moel yr Wden (SH 779 353)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Moel yr Wden, and it is adjoined to the Arenig group of hills which are situated in the central part of north Wales, and it is positioned with the A4212 road to its north-west, the A470 road to its south-west and the A494 road to its south-east, and has the village of Trawsfynydd towards the west.

The Name: Moel yr Wden is a transposed name as local enquiry confirms that it is applicable to a 520m upper contour map heighted hill positioned to the west of this, the qualifying Dewey, with the name placement on the Ordnance Survey 1:50,000 Landranger map being appropriate.

This hill was not included in the original 1995 Constable publication, as with a 560m uppermost contour and bwlch contouring between 530m – 540m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and with the opposing 540m contours relatively close together, this implied this hill was unlikely to have sufficient drop to qualify for this list.

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

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

Although the above was noted by Myrddyn Phillips, a basic levelling survey of this hill was conducted on the 21^st July 2000, with a surprising result of 112ft / 34.1m of drop. As this result was at odds with Ordnance Survey contouring, Michael Dewey was informed, but it was decided not to promote this hill to Dewey status and wait for the result of a second survey of this hill.

The second basic levelling survey of this hill was conducted on the 27^th October 2001 by Myrddyn Phillips and Rob Woodall, resulting in the same drop value as the first; 112ft / 34.1m. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 2^nd November 2001.

Graham Jackson and Janet Jackson during the line survey of Moel yr Wden

As this hill qualified for the Dewey list through a basic levelling survey and as this was at odds with Ordnance Survey map contouring, it was prioritised for a line survey, and this took place on the 31^st March 2008. The line survey consisted of two teams; Graham Jackson and Janet Jackson who concentrated on the drop value of Moel yr Wden, and John Barnard and Myrddyn Phillips who line surveyed from the 619m map heighted summit of Gallt y Daren (SH 778 344) to the bwlch position of Moel yr Wden, this resulted in 34.1m of drop with the summit of Moel yr Wden being 572.9m in height dependent upon the accuracy of the 619m spot height atop Gallt yr Daren. This survey confirmed this hill’s Dewey status.

The Leica 530 set-up position at the summit of Moel yr Wden

The Leica 530 set-up position at the bwlch of Moel yr Wden

As the resulting height of Moel yr Wden was still at odds with its 560m uppermost Ordnance Survey contour the hill was prioritised for a GNSS survey. This was conducted by John Barnard, Graham Jackson and Myrddyn Phillips on the 25^th November 2008, resulting in a 572.3m summit height and a 538.2m bwlch height, with these values giving this hill 34.0m of drop, confirming that the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map are missing an uppermost 570m ring contour.

The full details for the hill are:

Name: Moel yr Wden

OS 1:50,000 map: 124

OS 1:25,000 map: 18, 23

Summit Height: 572.3m (Leica 530)

Summit Grid Reference: SH 78012 35618 (Leica 530)

Bwlch Height: 538.2m (line survey relative to summit height)

Bwlch Grid Reference: SH 77981 35395 (Leica 530)

Drop: 34.1m (line survey)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Cefn Coch (SH 923 266) – Dewey addition (47th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

Cefn Coch (SH 923 266)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Cefn Coch, and it is adjoined to the Aran group of hills which are situated in the southern part of north Wales, and it is positioned with the A494 road to its north and west, the A458 road to its south and the B4393 road to its south-east, and has the town of Y Bala towards the north.

This hill was not included in the original 1995 Constable publication, but with a 594m summit spot height and bwlch contouring between 560m – 570m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by David Purchase and Myrddyn Phillips, and the latter was joined by Rob Woodall to then conduct a basic levelling survey of this hill on the 28^th October 2001, resulting in 103ft / 31.4m of drop. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 2^nd November 2001.

Rob Woodall during the basic levelling survey of Cefn Coch

Since the inclusion of this hill in the Dewey list the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map became available online. This mapping had many spot heights not on other publicly available Ordnance Survey maps and gave a 565m spot height on the area of this hill’s bwlch, and when coupled with the 594m summit spot height these values gave this hill 29m of drop.

The Trimble GeoXH 6000 gathering data at the summit of Cefn Coch

The Leica RX1250 gathering data at the bwlch of Cefn Coch

As this hill qualified for the Dewey list through a basic levelling survey and as the online Vector Map Local only gave the hill 29m of drop, it was prioritised for a GNSS survey, and this took place on the 19^th October 2016. The summit and bwlch of this hill were surveyed by Alan Dawson and Myrddyn Phillips using a Leica RX1250 and Trimble GeoXH 6000 respectively, resulting in a 592.9m summit height and a 561.7m bwlch height, with these values giving this hill 31.25m of drop, and therefore confirming its Dewey status.

The full details for the hill are:

Name: Cefn Coch

OS 1:50,000 map: 125

OS 1:25,000 map: 23

Summit Height: 592.9m (Leica RX1250)

Summit Grid Reference: SH 92310 26675 (Leica RX1250)

Bwlch Height: 561.7m (Leica RX1250)

Bwlch Grid Reference: SH 92501 26927 (Leica RX1250)

Drop: 31.25m (Leica RX1250)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Birnie Brae (NT 871 206) – Dewey addition (46th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Birnie Brae, and it is adjoined to the Cheviot group of hills which are situated in the north-east of England, and it is positioned with the B6401 road to its north-west, the A68 road to its west and the A697 road to its east, and has the town of Wooler towards the north-east.

This hill was not included in the original 1995 Constable publication, but with a 508m summit spot height and col contouring between 470m – 480m that appear on the Ordnance Survey 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by David Purchase and Myrddyn Phillips who worked independently but also exchanged all data, with David assessing the hill’s qualification on site. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 28^th July 2001.

Since the inclusion of this hill in the Dewey list the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map became available online. This mapping had many spot heights not on other publicly available Ordnance Survey maps and gave a 477m col spot height for this hill, and when coupled with the 508m summit spot height, these values give this hill 31m of drop.

The full details for the hill are:

Name: Birnie Brae

OS 1:50,000 map: 74

OS 1:25,000 map: 16

Summit Height: 508m (spot height)

Summit Grid Reference: NT 87163 20684 (hand-held GPS via DoBIH)

Col Height: 477m (spot height)

Col Grid Reference: NT 87931 20064 (spot height)

Drop: 31m (spot height summit and col)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Beardown Tors (SX 602 773) – Dewey addition (45th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

LIDAR image of Beardown Tors (SX 602 773)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Beardown Tors, and it is adjoined to the Dartmoor group of hills which are situated in the south-west of England, and it is positioned with the A386 road to its west, the B3357 road to its south-west and the B3212 road to its east, and has the town of Tavistock towards the west.

This hill was not included in the original 1995 Constable publication, but with a 513m summit spot height and col contouring between 480m – 490m that appear on the Ordnance Survey 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey as the opposing 480m ring contours are relatively close together.

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

Since the inclusion of this hill in the Dewey list the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map became available online. This mapping had many spot heights not on other publicly available Ordnance Survey maps and gave a 481m col spot height, and when coupled with the 513m summit spot height, these values gave this hill 32m of drop.

LIDAR summit image of Beardown Tors

LIDAR col image of Beardown Tors

The summit and col height for this hill were subsequently ascertained from LIDAR analysis conducted by Myrddyn Phillips, resulting in a 512.4m summit height and a 480.9m col height, with these values giving this hill 31.6m of drop and therefore confirming its Dewey status.

The full details for the hill are:

Name: Beardown Tors

OS 1:50,000 map: 191

OS 1:25,000 map: 28

Summit Height: 512.4m (LIDAR)

Summit Grid Reference: SX 60285 77312 (LIDAR)

Col Height: 480.9m (LIDAR)

Col Grid Reference: SX 60251 77961 (LIDAR)

Drop: 31.6m (LIDAR)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Seat Robert (NY 526 114) – Dewey addition (44th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

LIDAR image of Seat Robert (NY 526 114)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Seat Robert, and it is adjoined to the High Street group of hills which are situated in the Lake District in England, and it is positioned with the A6 road and M6 motorway to its east, and has the village of Shap towards the north-east.

This hill was not included in the original 1995 Constable publication, but with a 515m summit spot height and col contouring between 480m – 490m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The summit and col height for this hill and their positions were subsequently ascertained from LIDAR analysis conducted by Myrddyn Phillips, resulting in a 515.5m summit height and a 483.5m col height, with these values giving this hill 32.0m of drop.

The full details for the hill are:

Name: Seat Robert

OS 1:50,000 map: 90

OS 1:25,000 map: 5

Summit Height: 515.5m (LIDAR)

Summit Grid Reference: NY 52644 11407 (LIDAR)

Col Height: 483.5m (LIDAR)

Col Grid Reference: NY 52101 11015 (LIDAR)

Drop: 32.0m (LIDAR)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Steeperton Tor (SX 618 887) – Dewey addition (43rd reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

LIDAR image of Steeperton Tor (SX 618 887)

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain Tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Steeperton Tor, and it is adjoined to the Dartmoor group of hills which are situated in the south-west of England, and it is positioned with the A30 road to its north, the A386 road to its west, the B3212 road to its south-east and the A382 road to its east, and has the town of Okehampton towards the north north-west.

This hill was not included in the original 1995 Constable publication, but with a 532m summit spot height and col contouring between 500m – 510m that appear on the Ordnance Survey 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey as the 0pposing 500m ring contours are close together.

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

The summit and col height for this hill were subsequently ascertained from LIDAR analysis conducted by Myrddyn Phillips, resulting in a 533.1m summit height and a 500.9m col height, with these values giving this hill 32.2m of drop and therefore confirming its Dewey status.

The full details for the hill are:

Name: Steeperton Tor

OS 1:50,000 map: 191

OS 1:25,000 map: 28

Summit Height: 533.1m (LIDAR)

Summit Grid Reference: SX 61846 88718 (LIDAR)

Col Height: 500.9m (LIDAR)

Col Grid Reference: SX 61733 88258 (LIDAR)

Drop: 32.2m (LIDAR)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

THIS HILL HAS SUBSEQUENTLY BEEN DELETED FROM THE DEWEY LIST

Girdle Fell (NY 697 017) – Dewey addition (42nd reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Girdle Fell, and it is adjoined to the Cheviot group of hills which are situated in the north-east of England, and it is positioned with the A68 road and the Catcleugh Reservoir to its north-east, and has the town of Hawick towards the north-west.

This hill was not included in the original 1995 Constable publication, but with a 536m summit spot height adjoined to a triangulation pillar and col contouring between 500m – 510m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The full details for the hill are:

Name: Girdle Fell

OS 1:50,000 map: 80

OS 1:25,000 map: 16

Summit Height: 536m (triangulation pillar)

Summit Grid Reference: NY 69767 01768 (triangulation pillar)

Col Height: c 505m (interpolation)

Col Grid Reference: NY 68894 02214 (interpolation)

Drop: c 31m (triangulation pillar summit and interpolated col)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Bell Crags (NY 298 143) – Dewey addition (41st reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Bell Crags, and it is adjoined to the Scafell group of hills which are situated in the Lake District in England, and it is positioned with the B5289 road to its west and the A591 road and Thirlmere Reservoir to its east, and has the town of Keswick towards the north.

This hill was not included in the original 1995 Constable publication, but with a 558m summit spot height and col contouring between 520m – 530m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

As the interpolated drop value for this hill was close to the minimum 30m qualification for this list, the hill was prioritised for a GNSS survey, and this took place on the 30^th January 2010. The summit and col of this hill were surveyed by John Barnard and Graham Jackson using a Leica 530, resulting in a 559.1m summit height and a 526.7m col height, with these values giving this hill 32.4m of drop, and confirming its Dewey status.

The full details for the hill are:

Name: Bell Crags

OS 1:50,000 map: 89, 90

OS 1:25,000 map: 4

Summit Height: 559.1m (Leica 530)

Summit Grid Reference: NY 29829 14303 (hand-held GPS via survey)

Col Height: 526.7m (Leica 530)

Col Grid Reference: NY 29689 14049 (Leica 530)

Drop: 32.4m (Leica 530)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Black Crags (NY 255 080) – Dewey addition (40th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Black Crags, and it is adjoined to the Scafell group of hills which are situated in the Lake District in England, and it is positioned with the B5289 road to its north, the B5343 road to its south-east and the A591 road to its east, and has the town of Ambleside towards the east south-east.

This hill was not included in the original 1995 Constable publication, but with a 588m summit spot height and col contouring between 550m – 560m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

However, it was not until LIDAR became available that the col 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 col image of Black Crags

The col height for this hill was subsequently ascertained from LIDAR analysis conducted by Myrddyn Phillips, resulting in a 556.3m col height, with this value giving this hill 32m of drop.

The full details for the hill are:

Name: Black Crags

OS 1:50,000 map: 89, 90

OS 1:25,000 map: 6

Summit Height: 588m (spot height)

Summit Grid Reference: NY 25545 08081 (hand-held GPS via DoBIH)

Col Height: 556.3m (LIDAR)

Col Grid Reference: NY 25403 08012 (LIDAR)

Drop: 32m (spot height summit and LIDAR col)

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

THIS HILL HAS SUBSEQUENTLY BEEN DELETED FROM THE DEWEY LIST

Birks Fell (SD 919 761) – Dewey addition (39th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Birks Fell, and it is adjoined to the Ingleborough group of hills which are situated in the Yorkshire Dales in England, and it is positioned with the A684 road to its north, the B6479 road to its west, the A65 road to its south and the B6160 road to its east, and has the town of Settle towards the south-west.

This hill was not included in the original 1995 Constable publication, but as it was not included at the time in the 2000ft (609.6m) hill lists of Nuttalls (P15) and Hewitts (P30) it was prudent that it should be included as a Dewey. However, it did possess a 610m summit spot height on the Ordnance Survey 1:50,000 Landranger map.

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

This hill had been proposed for inclusion as a Nuttall and Hewitt by several people, most notably John Barnard and Graham Jackson who on the 3^rd June 2006 used an automatic level in calculating the height of this hill. The Ordnance Survey subsequently confirmed its height as over 609.6m resulting in its deletion from Dewey status.

LIDAR summit image of Birks Fell

LIDAR col image of Birks Fell

The summit and col heights for this hill were subsequently ascertained from LIDAR analysis conducted by Myrddyn Phillips. The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. This analysis resulted in a 610.3m summit height positioned at SD 91879 76371 and a 452.2m col height positioned at SD 83648 76034, with these values giving this hill 158.1m of drop, confirming its deletion from Dewey status.

The full details for the hill are:

Name: Birks Fell

OS 1:50,000 map: 98

OS 1:25,000 map: 30

Summit Height: 609m (as listed in the Deweys)

Summit Grid Reference: SD 919 761 (as listed in the Deweys)

Col Height: 452m (spot height)

Col Grid Reference: SD 83627 76052 (spot height)

Drop: 157m

Myrddyn Phillips (August 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

THIS HILL HAS SUBSEQUENTLY BEEN DELETED FROM THE DEWEY LIST

Meal Fell (NY 283 337) – Dewey addition (38th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Meal Fell, and it is adjoined to the Skiddaw group of hills which are situated in the Lake District in England, and it is positioned with the B5299 road to its north, the A591 road to its west and the A66 road to its south, and has the town of Keswick towards the south.

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

The above detail was noted by Rob Woodall and Myrddyn Phillips who worked independently but also exchanged all data, with Rob assessing the hill’s qualification on site on the 14^th November 2000. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 19^th November 2000.

The full details for the hill are:

Name: Meal Fell

OS 1:50,000 map: 89, 90

OS 1:25,000 map: 4

Summit Height: 550m (spot height)

Summit Grid Reference: NY 28301 33763 (hand-held GPS via DoBIH)

Col Height: c 520m (interpolation)

Col Grid Reference: NY 28563 33775 (interpolation)

Drop: c 30m (spot height summit and interpolated col)

Myrddyn Phillips (July 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

THIS HILL HAS SUBSEQUENTLY BEEN DELETED FROM THE DEWEY LIST

Little Fell (NY 766 009) – Dewey addition (37th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Little Fell, and it is adjoined to the Great Shunner group of hills which are situated in the Yorkshire Dales in England, and it is positioned with the A683 road to its west, the A684 road to its south and the B6259 road to its east, and has the town of Kirkby Stephen towards the north.

This hill was not included in the original 1995 Constable publication, but with a 559m summit spot height and col contouring between 520m – 530m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by Rob Woodall and Myrddyn Phillips who worked independently but also exchanged all data, with Rob assessing the hill’s qualification on site on the 14^th November 2000. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 19^th November 2000.

As the interpolated drop value for this hill was c 30m, which is the minimum required for Dewey qualification, the hill was subsequently prioritised for a level and staff line survey. This was conducted by John Barnard, Graham Jackson and Chris Crocker on the 12^th and 13^th October 2012, resulting in 28.8m of drop and this hill’s subsequent deletion from the list of Deweys (see later Hill Reclassifications post).

The full details for the hill are:

Name: Little Fell

OS 1:50,000 map: 91

OS 1:25,000 map: 19

Summit Height: 559m (spot height)

Summit Grid Reference: NY 76646 00997 (hand-held GPS via DoBIH)

Col Height: c 529m (interpolation)

Col Grid Reference: NY 76709 00346 (interpolation)

Drop: c 30m (spot height summit and interpolated col)

Myrddyn Phillips (July 2020)

Mapping Mountains - Hill Reclassifications - The 500-Metre Tops of England and Wales - Deweys

Oxnop Common (SD 924 947) – Dewey addition (36th reclassification)

This is one in a series of retrospective Hill Reclassification posts that detail hills whose status has altered in the listing of the Deweys and where I have had direct association with the status change. These posts will tie in with a forthcoming Change Register giving detail to this list and its alterations since publication in the Mountain tables book.

1995 Mountain tables published by Constable with 373 hills listed as Deweys.

April 2000 Strider (LDWA quarterly booklet) publishes contact details for David Purchase and Myrddyn Phillips who have found and list 24 and 14 possible new 500m tops respectively.

It was expanded versions of the above two lists that formed the basis of the next publication:

25^th May 2000 List of Possible 500 Metre Tops by Michael Dewey listing 44 hills.

David Purchase expands his Additional Dewey 500m Hills and Myrddyn Phillips produces lists of English 500m hills to measure and Welsh 500m hills to measure.

These lists formed the basis of the next publication:

April 2002 The 500+ Tops of England and Wales – The ‘New Deweys’ published in the Strider booklet and listing 66 new qualifying hills.

25^th May 2006 Rob Woodall republishes Michael’s main and possible/probable lists on the RHB Yahoo group file database.

Mountain tables by Michael Dewey

The details for this addition appear below:

The name the hill is listed by in the Deweys is Oxnop Common, and it is adjoined to the Great Shunner group of hills which are situated in the Yorkshire Dales in England, and it is positioned with the B6270 road to its north and the A684 road to its south, and has the village of Muker towards the north north-west.

This hill was not included in the original 1995 Constable publication, but with a 584m summit spot height and col contouring between 550m – 560m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, the interpolated drop value was estimated sufficient for this hill to be a potential new Dewey.

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

The above detail was noted by Rob Woodall and Myrddyn Phillips who worked independently but also exchanged all data, with Rob having assessed the hill’s qualification on site. These details were forwarded to the list author; Michael Dewey and the hill was added to the list on the 19^th November 2000.

The full details for the hill are:

Name: Oxnop Common

OS 1:50,000 map: 98

OS 1:25,000 map: 30

Summit Height: 584m (spot height)

Summit Grid Reference: SD 92461 94705 (hand-held GPS via DoBIH)

Col Height: c 552m (interpolation)

Col Grid Reference: SD 91830 95279 (interpolation)

Drop: c 32m (spot height summit and interpolated col)

Myrddyn Phillips (July 2020)

Thursday 15 October 2020

Mapping Mountains – Hill Reclassifications – The 500-Metre Tops of England and Wales – Deweys

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