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The
Fours – The 400m Hills of England
Sub-Fours
The Fours - The 400m Hills of England are the English hills at or above 400m and below 500m in height that have 30m minimum drop. The initial compilation of this list was completed in November 2002 and entitled The 400m Peaks of England and first published on 19th December 2002 on the RHB Yahoo Group file database along with the equivalent Welsh and Manx hills, with the file entitled the 400m hills of England, Isle of Man and Wales, this file was uploaded by Rob Woodall who later augmented data from Clem Clements into the database.
The original publication on the RHB Yahoo Group file database was later duplicated en masse by Mark Jackson without prior consultation with, or even notification to the author, with these data forming the equivalent part of the Tumps and with this act resulting in years of undue data divergence that is ongoing.
Over subsequent years updated versions of this list have been published on the Europeaklist website on the 15th December 2013 and available as a downloadable e-booklet and print-booklet version, and on the Haroldstreet website on the 6th January 2014 and available as GPS Waypoints, Google mapping and online hill bagging tick lists.
The compilation that originated in 2002 and subsequent publications of this list had an accompanying sub list that was named the 400m Sub-Fours. However, it wasn’t until the Europeaklist publication and the subsequent Haroldstreet publication that the listing included two other sub categories; the 390m Sub-Fours and the 390m Double Sub-Fours.
On the 10th July 2024 it was announced that the title of the 400m Sub-Fours had been amended to just the Sub Fours, with its criteria also being amended to the English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop, with the two categories of 390m sub hills also being dispensed with.
When this sub category was first published in December 2013 by Europeaklist, there were 154 hills listed that met the qualification for Sub-Four status, all these hills were identified leading up to this publication. After this list was later published on 6th January 2014 by Phil Newby on his Haroldstreet website all future updates to the list have been catalogued on the Mapping Mountains site.
Since its original publication this list has changed greatly as it is now co-authored with Aled Williams, and although the criteria has remained the same for the main P30 list, it now includes the revised criteria for the Sub-Fours. The listing also benefits from accurate surveys conducted by independent surveyors using GNSS receivers, an expanded range of online Ordnance Survey maps and most recently, by LIDAR analysis, all of which enables greater accuracy for numerical data. However, it is not just numerical data that has seen this list develop since its first inception, it is also place-name information, and it was because of this and their mutual interest in hill lists that the authors first corresponded. The listing is also gaining in popularity as there are now two known completers of The Fours - The 400m Hills of England with many others having completed 100 or more of these hills.
It seems fitting that the list of The Fours – The 400m Hills of England should now benefit from a detailed Change Register to the category of the Sub-Fours, and although updates to this sub category have been detailed on the Mapping Mountains site, it is prudent for this Change Register to initially detail the changes to this sub list since the December 2013 publication by Europeaklist.
The Change Register to the Sub-Fours appears below with the reclassifications to the list detailed chronologically in receding order.
Change Register
The Fours – The 400m Hills of England
Sub-Fours
16th July 2024 – Haroldstreet publishes The Fours - The 400m Hills of England.
Sub-Four total confirmed as 317.
10th July 2024 – Mapping Mountains publishes The Fours - The 400m Hills of England.
Sub-Four total confirmed as 317.
Sub-Fours total confirmed as 317.
On the 10th July 2024 it was announced that the sub hills accompanying the main list of the The Fours - The 400m Hills of England now take in just one category, this category is entitled the Sub-Fours and take in all English hills 400m and above and below 500m in height that have 15m and more and below 30m of drop.
Wittaburrow 404.1m at SX 73346 75210
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Wittaburrow (SX 733 752) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 13.03.24. The hill was previously listed with 19m of drop, based on the 403m summit spot height
that appears on the contemporary Ordnance Survey 1:25,000 Explorer map and the
384m col spot height that appeared on the Ordnance Survey Vector Map Local
hosted on the Geograph website and which was entitled the Interactive Coverage
Map. Its addition is due to LIDAR
analysis conducted by Myrddyn Phillips, resulting in a 404.1m summit height and
a 383.5m col height, with these values giving this hill 20.6m of drop. 400m Sub-Four total increases by one and confirmed as 152.
Burbage Edge 500.2m at SK 02961 73235
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Burbage Edge (SK 029 732) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 12.10.23. The hill was previously listed as a 400m
Sub-Four with an estimated c 21m of
drop, based on a 499m summit height and the 479m col spot height that appears on
the Ordnance Survey 1:25,000 Explorer map.
This was based on ground at the base of the 500.097m flush bracket
height attached to the accompanying triangulation pillar being approximately
499.8m in height. Its deletion is due to
LIDAR analysis conducted by Myrddyn Phillips, resulting in a 500.2m summit
height and a 477.5m col height, with these values giving this hill 22.7m of
drop. 400m Sub-Four total decreases by
one and confirmed as 151.
Strines Moor 410.2m at SK 21177 89651
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Strines Moor (SK 211 896) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 23.09.23. The hill was previously listed as a 400m
Sub-Four with an estimated c 20m of
drop, based on an estimated c 411m summit height and the 391m col spot height
that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph
website and which was entitled the Interactive Coverage Map. Its deletion is due to LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 410.2m summit height and a 390.7m
col height, with these values giving this hill 19.5m of drop. 400m Sub-Four total decreases by one and confirmed as 152.
Hawkshead 407.2m at SD 63395 60302
%20-%20LIDAR%20summit%202.jpg) |
| LIDAR image of Hawkshead (SD 633 603) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 03.06.23. The hill was previously listed as a 400m
Sub-Four with an estimated c 20m of
drop, based on the 408m summit spot height that appears on the Ordnance Survey 1:50,000
Landranger and 1:25,000 Explorer map and an estimated c 388m col height based
on interpolation of 10m contouring between 380m – 390m. Its deletion is due to LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 407.2m summit height and a 389.8m
col height, with these values giving this hill 17.4m of drop. 400m Sub-Four total decreases by one and confirmed as 153.
Thwaite Scars 407.1m at SD 76287 70892
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Thwaite Scars (SD 762 708) |
The
reclassification of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 28.04.23. The hill was previously listed as a Four with 30m of drop, based on the 408m summit spot
height that appears on the Ordnance Survey 1:25,000 Explorer map and the 378m
col spot height that appeared on the Ordnance Survey Vector Map Local hosted on
the Geograph website and which was entitled the Interactive Coverage Map. Its reclassification is due to LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 407.1m summit height and a 377.7m
col height, with these values giving this hill 29.4m of drop. 400m Sub-Four total increases by one and confirmed as 154.
Eastgate Quarry 413.0m at NY 94100 36976
%20-%20LIDAR%20sum%202.jpg) |
| LIDAR image of Eastgate Quarry (NY 941 369) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 05.03.23. The hill was previously not listed based on it being a part of a quarry and therefore
contemporary Ordnance Survey maps do not show any meaningful contours. Its addition to 400m Sub-Four status is due
to LIDAR analysis conducted by Myrddyn Phillips, resulting in a 413.0m summit
height and a 388.0m col height, with these values giving this hill 24.95m of
drop. 400m Sub-Four total increases by
one and confirmed as 153.
Eastgate Quarry 407.5m at NY 94599 37106
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Eastgate Quarry (NY 945 371) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the
27.02.23. The hill was previously not
listed based on it being a part of a
quarry and therefore contemporary Ordnance Survey maps do not show any meaningful
contours. Its addition to 400m Sub-Four
status is due to LIDAR analysis conducted by Myrddyn Phillips, resulting in a
407.5m summit height and a 384.9m col height, with these values giving this
hill 22.6m of drop. 400m Sub-Four total increases by
one and confirmed as 152.
Burners Hills 403.1m at NY 94228 17203
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Burners Hills (NY 942 172) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 31.01.23. The hill was previously listed as a 400m
Sub-Four with an estimated c 21m of
drop, based on the 404m summit spot height that appears on the Ordnance Survey
1:25000 Explorer map and an estimated c 383m col height, based on interpolation
of 5m contours between 380m – 385m that appeared on the interactive mapping
hosted on the OS Maps website. Its
deletion is due to LIDAR analysis conducted by Myrddyn Phillips, resulting in a
403.1m summit height and a 383.2m col height, with these values giving this
hill 19.9m of drop. 400m Sub-Four total decreases by
one and confirmed as 151.
Tod Fell 400.3m at NY 51224 02058
%20-%20LIDAR%20hill%204.jpg) |
| LIDAR image of Tod Fell (NY 512 020) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 31.12.22. The hill was previously listed as a 400m
Sub-Four with 20m of drop, based on
the 401m summit spot height that appears on the Ordnance Survey 1:50,000
Landranger and 1:25,000 Explorer map and the 381m col spot height that appeared
on the Ordnance Survey Vector Map Local hosted on the Geograph website and
which was entitled the Interactive Coverage Map. Its deletion is due to LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 400.3m summit height and a 381.7m
col height, with these values giving this hill 18.7m of drop. 400m Sub-Four total decreases by one and confirmed as 152.
Langhow Pike 403.6m at NY 52952 13105
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Langhow Pike (NY 529 131) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 28.12.22. The hill was previously listed as a 400m
Sub-Four with an estimated c 21m of
drop, based on the 405m summit spot height that appears on the Ordnance Survey
1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 384m col
height, based on interpolation of 10m contouring between 380m – 390m. Its deletion is due to LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 403.6m summit height and a 384.1m
col height, with these values giving this hill 19.5m of drop. 400m Sub-Four total decreases by one and confirmed as 153.
Pt. 428.7m 428.7m at NY 30015 01705
%20-%20LIDAR%20summit%202.jpg) |
| LIDAR image of Pt. 428.7m (NY 300 017) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 18.12.22. The hill was previously listed as a 400m
Sub-Four with an estimated c 20m of
drop, based on the 428m summit spot height that appears on the Ordnance Survey
1:25,000 Explorer map and an estimated c 408m col height, based on interpolation
of 10m contouring between 400m – 410m. Its
deletion is due to LIDAR analysis conducted by Myrddyn Phillips, resulting in a
428.7m summit height and a 409.3m col height, with these values giving this
hill 19.4m of drop. 400m Sub-Four total decreases by
one and confirmed as 154.
Peathill Crag 402.7m at NY 22837 01336
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Peathill Crag (NY 228 013) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 15.12.22. The hill was previously noted and listed with an estimated c 15m of drop,
based on an estimated c 401m summit height and an estimated c 386m col height,
with both heights based on interpolation of 5m contouring that appeared on the
interactive mapping hosted on the OS Maps website. Its addition is due to LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 402.7m summit height and a 382.3m
col height, with these values giving this hill 20.4m of drop. 400m Sub-Four total increases by one and confirmed as 155.
Belles Knott 490.6m at NY 29711 08585
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Belles Knott (NY 297 085) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 12.12.22. The hill was previously listed as a 400m
Sub-Four with an estimated c 21m of
drop, based on an estimated c 493m summit height and an estimated c 472m col
height, with both heights based on interpolation of 5m contouring that appeared
on the interactive mapping hosted on the OS Maps website. Its deletion is due to LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 490.6m summit height and a 471.65
col height, with these values giving this hill 18.9m of drop. 400m Sub-Four total decreases by one and confirmed as 154.
Gale Fell 499.2m at NY 14365 16796
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Gale Fell (NY 143 167) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 05.12.22. The hill was previously listed as a 400m
Sub-Four with an estimated c 20m of
drop, based on the 499m summit spot height that appears on the Ordnance Survey
1:25,000 Explorer map and an estimated c 479m col height, based on
interpolation of 10m contouring between 470m – 480m that appears on the
Ordnance Survey 1:25,000 Explorer map.
Its deletion is due to LIDAR analysis conducted by Myrddyn Phillips,
resulting in a 499.2m summit height and a 479.7m col height, with these values
giving this hill 19.5m of drop. 400m
Sub-Four
total decreases by one and confirmed as 155.
Cold Stones 421.2m at SE 12584 63663
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Cold Stones (SE 125 636) |
The
reclassification of this hill from 400m Sub-Four status was announced on
Mapping Mountains with a retrospective Hill Reclassifications post published on
the 23.11.22. The hill was previously
listed as a 400m Sub-Four with an
estimated c 26m of drop, based on an estimated c 417m summit height and a 391m col
height, the latter based on the spot height that appeared on the Ordnance
Survey Vector Map Local hosted on the Geograph website and which was entitled
the Interactive Coverage Map. Its
inclusion as a Four is due to LIDAR analysis conducted by Myrddyn Phillips,
resulting in a 421.2m summit height and a 390.8m col height, with these values
giving this hill 30.4m of drop. 400m Sub-Four total
decreases by one and confirmed as 156.
Weather Hill 410.0m at NY 92906 39126
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Weather Hill (NY 929 391) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 17.11.22. The hill was previously not listed based on it being a part of a quarry and therefore
contemporary Ordnance Survey maps do not show any meaningful contours. Its addition to 400m Sub-Four status was
prompted by Joe Nuttall who produced a summit analysis programme using LIDAR,
and then confirmed by LIDAR analysis conducted by Myrddyn Phillips, resulting
in a 410.0m summit height and a 389.0m col height, with these values giving
this hill 21.0m of drop. 400m Sub-Four total increases by
one and confirmed as 157.
Great Castle How 498.2m at NY 30791 07836
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Great Castle How (NY 307 078) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 07.11.22. The hill was previously not listed as its drop to an adjacent and connecting 500m spot
heighted hill was considered insufficient for qualification. Its addition to 400m Sub-Four status was
prompted by Joe Nuttall who produced a summit analysis programme using LIDAR,
and then confirmed by LIDAR analysis conducted by Myrddyn Phillips, resulting
in a 498.2m summit height and a 472.1m col height, with these values giving
this hill 26.0m of drop, with the caveat that LIDAR gives the summit of this
hill higher than the adjacent and connected hill that has a 500m spot height on
the contemporary Ordnance Survey 1:25,000 Explorer map. 400m Sub-Four total increases by one and confirmed as 156.
Lang Scar 416.8m at SD 88553 65292
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Lang Scar (SD 885 652) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 03.11.22. The hill was previously noted and listed with an estimated c 18m of drop,
based on the 416m summit spot height that appears on the Ordnance Survey 1:25,000
Explorer map and an estimated c 398m col height, based on interpolation of 10m
contouring between 390m – 400m. Its
addition to 400m Sub-Four status was prompted by Joe Nuttall who produced a
summit analysis programme using LIDAR, and then confirmed by LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 416.8m summit height and a 396.4m
col height, with these values giving this hill 20.4m of drop. 400m Sub-Four total increases by one and confirmed as 155.
Fisher Crag 422.4m at NY 30491 16304
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Fisher Crag (NY 304 163) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 31.10.22. The hill was previously noted and listed with an estimated c 17m of drop,
based on the 422m summit spot height that appeared on the Ordnance Survey
Vector Map Local hosted on the Geograph website and which was entitled the
Interactive Coverage Map and an estimated c 405m col height, based on
interpolation of 10m contouring between 400m – 410m. Its addition to 400m Sub-Four status was
prompted by Joe Nuttall who produced a summit analysis programme using LIDAR,
and then confirmed by LIDAR analysis conducted by Myrddyn Phillips, resulting
in a 422.4m summit height and a 401.6m col height, with these values giving
this hill 20.7m of drop. 400m Sub-Four total increases by
one and confirmed as 154.
Pt. 476.0m 476.0m at NY 39930 04485
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Pt. 476.0m (NY 399 044) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 27.10.22. The hill was previously noted and listed with an estimated c 17m of drop,
based on the 474m summit spot height that appeared on the Ordnance Survey
Vector Map Local hosted on the Geograph website and which was entitled the
Interactive Coverage Map and an estimated c 457m col height, based on
interpolation of 10m contouring between 450m – 460m. Its addition to 400m Sub-Four status was
prompted by Joe Nuttall who produced a summit analysis programme using LIDAR,
and then confirmed by LIDAR analysis conducted by Myrddyn Phillips, with the col having been surveyed with a Leica GS15 by John Barnard, Jim Bloomer and Graham Jackson resulting
in a 476.0m summit height and a 454.8m col height, with these values giving
this hill 21.2m of drop. 400m Sub-Four total increases by
one and confirmed as 153.
Blackstone Edge 400.9m at SK 05031 64470
%20-%20LIDAR%20summit%203.jpg) |
| LIDAR image of Blackstone Edge (SK 050 644) |
The
deletion of this hill from 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 24.10.22. The hill was previously listed as a 400m Sub-Four
with an estimated c 20m of drop, based on an
estimated c 403m summit height and an estimated c 383m col height, with both
heights based on interpolation of 5m contouring. Its deletion was prompted by Joe Nuttall who
produced a summit analysis programme using LIDAR, and then by LIDAR analysis conducted
by Myrddyn Phillips, resulting in a 400.9m summit height and a 384.3m col
height, with these values giving this hill 16.6m of drop. 400m Sub-Four total decreases by one and confirmed as 152.
Pt. 414.7m 414.7m at SK 10999 67962
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Pt. 414.7m (SK 109 679) |
The
reclassification of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 15.10.22. The hill was previously listed as a Four with an estimated c 30m of drop, based on the 414m
spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an
estimated c 384m col height, based on interpolation of 5m contouring between 380m
– 385m. Its reclassification is due to
Joe Nuttall who produced a summit analysis programme using LIDAR, and then by
LIDAR analysis initially conducted by Jim Bloomer and subsequently by Myrddyn
Phillips, resulting in a 414.7m summit height and a 385.5m col height, with
these values giving this hill 29.2m of drop.
400m Sub-Four
total increases by one and confirmed as 153.
Dow Low 430.1m at SK 09419 68071
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Dow Low (SK 094 680) |
The
reclassification of this hill from 400m Sub-Four status was announced on
Mapping Mountains with a retrospective Hill Reclassifications post published on
the 29.09.22. The hill was previously
listed as a 400m Sub-Four with an estimated
c 29m of drop, based on an estimated c 426m summit height and an estimated c
397m col height, with both heights based on interpolation of 5m contouring that
appeared on the OS Maps website. Its inclusion
as a Four is due to LIDAR analysis conducted by Myrddyn Phillips, resulting in
a 430.1m summit height and a 396.3m col height, with these values giving this
hill 33.8m of drop. 400m Sub-Four total decreases
by one and confirmed as 152.
Long Crags 439.5m at NT 95597 21432
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Long Crags (NT 955 214) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 10.09.22. The hill was previously listed with 18m of drop, based on the 432m summit spot height positioned
at NT 95699 21058 that appears on the Ordnance Survey 1:50,000 Lanranger and
1:25,000 Explorer map and the 414m col spot height that appeared on the
Ordnance Survey Vector Map Local hosted on the Geograph website and which was
entitled the Interactive Coverage Map. Its
addition to 400m Sub-Four status is due to Joe Nuttall who produced a summit
analysis programme using LIDAR and subsequent LIDAR analysis conducted by
Myrddyn Phillips, resulting in a 439.5m summit height and a 415.8m col height,
with these values giving this hill 23.7m of drop. 400m Sub-Four total increases by one and confirmed
as 153.
Crook 464.7m at SD 66458 93550
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Crook (SD 664 935) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a retrospective Hill Reclassifications post published on the 31.08.22. The hill was previously listed with an
estimated c 17m of drop, based on the 462m
summit spot height that appears on the Harvey 1:25,000 Superwalker map to the
Howgill Fells and an estimated c 445m col height based on interpolation of 10m
contouring between 440m – 450m that appear on the Ordnance Survey 1:25,000
Explorer map. Its addition to 400m
Sub-Four status is due to Joe Nuttall who produced a summit analysis programme using
LIDAR and subsequent LIDAR analysis conducted by Myrddyn Phillips, resulting in
a 464.7m summit height and a 444.4m col height, with these values giving this
hill 20.3m of drop. 400m Sub-Four total
increases by one and confirmed as 152.
Peat
Law 472.0m at NT 90610 10125 & NT
90607 10132
%20-%20LIDAR%20summit%201.jpg) |
| LIDAR image of Peat Law (NT 906 101) |
The reclassification of this hill from 400m Sub-Four to Four status was announced on Mapping Mountains with a retrospective Hill Reclassifications post published on the 26.08.22. The hill was previously listed with an estimated c 29m of drop, based on the 472m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, and an estimated c 443m col height based on interpolation of 10m contouring between 440m – 450m. Its reclassification to Four status is due to Joe Nuttall who produced a summit analysis programme using LIDAR, and then by LIDAR analysis initially conducted by Jim Bloomer and subsequently by Myrddyn Phillips, resulting in a 472.0m summit height and a 441.7m col height, with these values giving this hill 30.4m of drop. 400m Sub-Four total decreases by one and confirmed as 151.
Dryhope Hill 486.4m at NT 92877 11671
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Dryhope Hill (NT 928 116) |
The
reclassification of this hill from 400m Sub-Four to Four status was announced
on Mapping Mountains with a retrospective Hill Reclassifications post published
on the 22.08.22. The hill was previously
listed with 29m of drop, based on the
486m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger
and 1:25,000 Explorer map, and the 457m col spot height that appeared on the
Ordnance Survey Vector Map Local hosted on the Geograph website and which was
entitled the Interactive Coverage Map.
Its reclassification to Four status is due to Joe Nuttall who produced a
summit analysis programme using LIDAR, and then by LIDAR analysis initially
conducted by Jim Bloomer and subsequently by Myrddyn Phillips, resulting in a
486.4m summit height and a 456.2m col height, with these values giving this
hill 30.2m of drop. 400m Sub-Four total decreases by
one and confirmed as 152.
Knott 465.8m at NY 71422 01291
 |
| LIDAR image of Knott (NY 714 012) |
The
Hill Reclassifications post announcing the change of status of this hill from a
Four to a 400m Sub-Four was published on Mapping Mountains on the
03.03.22. The hill was previously listed
with an estimated c 31m of drop based
on the 1,522.8ft (464.2m) surface height on the Ordnance Survey series of
Six-Inch maps and an estimated c 433m col height based on a comparison between
Ordnance Survey 1:25,000 Explorer map and Harvey 1:25,000 Superwalker map col
contours. Its reclassification to 400m Sub-Four status was prompted by Joe Nuttall who produced a summit analysis programme using LIDAR, and then by LIDAR analysis conducted by Aled Williams and subsequently Myrddyn Phillips, resulting in a 465.8m summit height and a 437.1m col height, with these values giving this hill 28.7m of drop. 400m Sub-Four total increases by
one and confirmed as 153.
Eldon Hill 470.6m at SK 11561 81143
 |
| LIDAR image of Eldon Hill (SK 115 811) |
The
reclassification of this hill from 400m Sub-Four to Four status was announced
on Mapping Mountains with a Hill Reclassifications post published on the 28.02.22. The hill was previously listed with an
estimated c 28m of drop based on the 470m summit spot
height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000
Explorer map and an estimated c 442m col height based on interpolation of 10m
contouring between 440m – 450m. Its
reclassification to Four status is due to Joe Nuttall who produced a summit analysis programme using LIDAR, and then by LIDAR analysis initially conducted
by Jim Bloomer and subsequently by Aled Williams, resulting in a 470.7m summit
height and a 440.1m col height, with these values giving this hill 30.6m of
drop. 400m Sub-Four total decreases by one and
confirmed as 152.
Low Fell 417.1m at NY 13598 22260
 |
| LIDAR image of Low Fell (NY 135 222) |
The
addition of this hill to 400m Sub-Four status was announced on Mapping
Mountains with a Hill Reclassifications post published on the 20.08.21. The hill was previously listed with an
estimated c 13m of drop based on the 412m summit spot
height that appears on the Ordnance Survey 1:25,000 Explorer map and an
estimated c 399m col height based on interpolation of 10m contouring between
390m – 400m. Its addition to 400m
Sub-Four status is due to; Ronnie Bowron who forwarded the details of this hill
that are given in the summit analysis programme produced by Joe Nuttall and
subsequent LIDAR analysis conducted by Myrddyn Phillips, resulting in a 417.1m
summit height and a 395.5m col height, with these values giving this hill 21.6m
of drop. 400m Sub-Four total increases by one and
confirmed as 153.
Andrew’s Edge 484.8m at SJ 98438 74706
%20-%20LIDAR%20hill%203.jpg)
LIDAR image of Andew's Edge (SJ 984 747)
The deletion of this hill from 400m
Sub-Four status was announced on Mapping Mountains with a Hill
Reclassifications post published on the 04.11.20. The hill was previously listed with 21m of drop based
on the 484m summit spot height that appeared on the Ordnance Survey
Vector Map Local hosted on the Geograph website and which was entitled the
Interactive Coverage Map, and the 463m col spot height that appears on the
Harvey 1:40,000 British Mountain Maps series to the Dark Peak. Its
deletion is due to a re-assessment of other digitally updated mapping available
online and subsequently confirmed from LIDAR analysis conducted by Myrddyn
Phillips, resulting in a 484.8m summit height and a 465.0m col height,
with these values giving this hill 19.7m of drop. 400m Sub-Four total decreases by one and confirmed as 152.
Great Nodden 436.4m at SX 53918 87419
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Great Nodden (SX 539 874) |
The addition of this hill to 400m Sub-Four status was announced on Mapping Mountains with a Hill Reclassifications post published on the 20.10.20. The hill was previously listed with 18m of drop based on the 437m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps and the 419m col spot height that used to appear on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. Its addition is due to interpolation of 5m contours between 410m - 415m that appeared on the OS Maps website, giving an estimated c 413m col height, with this mapping giving the position of the 419m spot height on an upslope, and subsequent confirmation from LIDAR analysis conducted by Myrddyn Phillips, resulting in a 436.4m summit height and a 414.1m col height, with these values giving this hill 22.3m of drop. 400m Sub-Four total increases by one and confirmed as 153.
Burners
Hills 404m at NY 94226 17210
THIS HILL HAS SUBSEQUENTLY BEEN DELETED FROM 400m SUB-FOUR STATUS
The addition of this hill to 400m Sub-Four status was announced on Mapping Mountains with a Hill Reclassifications post published on the 15.08.20. The hill was previously
listed with c 17m of drop based on the 404m summit
spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an
estimated c 387 col height based on interpolation of 5m contouring between 385m
– 390m that appeared on the OS Maps website.
The latter mapping is digitally updated and since this evaluation the
col contouring has altered to between 380m – 385m with an estimated c 383m col
height, with these values giving this hill c 21m of drop, which is sufficient for
it to be classified as a 400m Sub-Four.
400m Sub-Four total increases by one and confirmed as 152.
24th
April 2018 – Haroldstreet publishes The
Fours - The 400m Hills of England.
400m
Sub-Four total confirmed as 151.
24th
April 2018 – Mapping Mountains Publications publishes The Fours - The 400m Hills of England.
Horn Crag 422.0m at NY 31853 09924
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Horn Crag (NY 318 099) |
The addition of this hill to 400m Sub-Four status was announced when Mapping Mountains Publications published the 2nd edition of The Fours on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 23.03.19. The hill was previously listed with an estimated c 17m of drop based on interpolation of 10m contours for both summit and col with an estimated c 422m summit height and an estimated 405m col height. The addition of this hill is due to LIDAR analysis conducted by Myrddyn Phillips resulting in a 422.0m summit height and a 400.5m col height, with these values giving this hill 21.6m of drop, which is sufficient for it to be classified to 400m Sub-Four status. 400m Sub-Four total increases by one and confirmed as 151.
Anthony Hill 413.3m at SK 04646 70659
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Anthony Hill (SK 046 706) |
The addition of this hill to 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a subsequent Hill Reclassifications post published on Mapping Mountains on the 11.10.18. The hill was previously listed with an estimated c 18m of drop based on the 414m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 396m col height, based on 5m contouring between 395m – 400m that also appears on the Ordnance Survey 1:25,000 Explorer map. However as the contours at the col are on land that is now a part of a railway cutting they have insufficient detail to take in the depth of this cutting. Its addition is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map. This mapping has 5m contour intervals enabling the estimated height of the col to be more accurately assessed and its addition to 400m Sub-Four status has subsequently been confirmed from LIDAR analysis, resulting in a 413.3m summit height and a 385.9m col height, with these values giving this hill 27.4m of drop. 400m Sub-Four total increases by one and confirmed as 150.
Pt. 404.4m 404.4m at SK 07380 69895
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Pt. 404.4m (SK 073 698) |
The deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post published on Mapping Mountains on the 21.09.18. The hill was previously listed with an estimated c 22m of drop based on the 405m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 383m col height based on 5m col contouring presumed between 380m – 385m. However, as the col of this hill is situated on land that is a part of the Hillhead Quarry these contours are not continuous. The deletion of this hill is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map, this mapping has 5m continuous contours between 385m – 390m, with an estimated c 386m col height, with these values giving this hill an estimated c 19m of drop. Its deletion has now been confirmed by LIDAR analysis, resulting in a 404.4m summit height and a 384.9m col height, with these values giving this hill 19.4m of drop, which is insufficient for inclusion as a 400m Sub-Four. 400m Sub-Four total decreases by one and confirmed as 149.
Dow Low 414.9m (artificial) at SK 09975 67525
%20-%20LIDAR%20summit%201.jpg) |
| LIDAR image of Dow Low (SK 099 675) |
This is an artificial hill and its inclusion as a 400m Sub-Four was announced when the 2nd edition of The Fours was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post then being published on Mapping Mountains on the 14.09.18. This hill’s inclusion in this sub category is due to analysis of 5m contour intervals available on the OS Maps website, which is the recent replacement for OS Get-a-map, coupled with analysis of imagery on Google Maps as well as Google Earth resulting in this hill being considered solid and stable, with confirmation from subsequent LIDAR analysis conducted by Myrddyn Phillips. Its initial inclusion as a 400m Sub-Four was based on the mapping on the OS Maps website giving this hill an uppermost 410m ring contour and col contouring between 390m – 395m, with interpolation giving an estimated c 412m summit height and an estimated c 392m col height, with these values giving this hill an estimated c 20m of drop. Subsequent LIDAR analysis gives a 414.9m summit height and a 391.2m col height, with these values giving this hill 23.7m of drop, which confirms its addition to 400m Sub-Four status. 400m Sub-Four total increases by one and confirmed as 150.
Dow
Low 410.7m (artificial) at SK 10723 67331
%20-%20LIDAR%20summit%201.jpg) |
| LIDAR image of Dow Low (SK 107 673) |
This is an artificial hill and its inclusion as a 400m Sub-Four was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a subsequent Hill Reclassifications post published on Mapping Mountains on the 25.08.18. The inclusion of this hill in this sub category is due to analysis of 5m contour intervals available on the OS Maps website, which is the recent replacement for OS Get-a-map, coupled with analysis of imagery on Google Maps as well as Google Earth resulting in this hill being considered solid and stable, with confirmation from subsequent LIDAR analysis conducted by Myrddyn Phillips. OS Maps give the hill an uppermost 410m ring contour and col contouring between 385m – 390m, resulting in an estimated c 410m summit height and an estimated c 387m col height, with these values giving this hill an estimated c 23m of drop which is sufficient for it to be listed as a 400m Sub-Four. Subsequent LIDAR analysis gives a 410.7m summit height and a 387.3m col height, with these values giving this hill 23.3m of drop, which confirms its addition to 400m Sub-Four status. 400m Sub-Four total increases by one and confirmed as 149.
Dow Low 419.2m (artificial) at SK 09807 67866
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Dow Low (SK 098 678) |
This is an artificial hill and its inclusion as a 400m Sub-Four was announced when the 2nd edition of The Fours was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post published on Mapping Mountains on the 20.08.18. The inclusion of this hill in this sub category is due to analysis of 5m contour intervals available on the OS Maps website, which is the recent replacement for OS Get-a-map, coupled with analysis of imagery on Google Maps as well as Google Earth resulting in this hill being considered solid and stable, with confirmation from subsequent LIDAR analysis conducted by Myrddyn Phillips. Its initial inclusion as a 400m Sub-Four was based on the mapping on the OS Maps website giving this hill an uppermost 415m ring contour and col contouring between 385m – 390m, with interpolation giving an estimated c 416m summit height and an estimated c 388m col height, with these values giving this hill an estimated c 28m of drop. Subsequent LIDAR analysis gives a 419.2m summit height and a 398.0m col height, with these values giving this hill 21.2m of drop, which confirms its addition to 400m Sub-Four status. 400m Sub -Four total increases by one and confirmed as 148.
Dow Low c 426m (artificial) at SK 094 680
THIS
HILL HAS SUBSEQUENTLY BEEN RECLASSIFIED TO FOUR STATUS
This is an artificial hill and its inclusion as a 400m Sub-Four was announced when the 2nd
edition of The Fours was published by
Mapping Mountains Publications on the 24.04.18, a Hill Reclassifications post
was then published on Mapping Mountains on the 15.08.18. This hill’s inclusion in this sub category is
due to analysis of the 5m contour intervals on the OS Maps website, which is
the recent replacement for OS Get-a-map, coupled with analysis of imagery on
Google Maps as well as Google Earth resulting in the conclusion that this hill
is solid and stable. OS Maps give the
hill two uppermost 425m contours and col contouring between 395m – 400m, resulting
in an estimated summit height of c 426m and an estimated col height of c 397m,
with these values giving this hill c 29m of drop which is sufficient for it to
be listed as a 400m Sub-Four. 400m
Sub-Four total increases by one and confirmed as 147.
Back Pasture Hill 485.8m at SD 90511 68095
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Back Pasture Hill (SD 905 680) |
The addition of this hill to 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a subsequent Hill Reclassifications post published on Mapping Mountains on the 10.08.18. The hill was previously listed with an estimated c 16m of drop, based on the 484m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 468m col height, based on interpolation of 10m contouring between 460m -470m. Its addition to 400m Sub-Four status is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map. This mapping has 5m contour intervals enabling the estimated col height to be narrowed down, and with an estimated c 464m col height, based on interpolation of contouring between 460m – 465m, these values give this hill an estimated c 20m of drop, which is sufficient for its inclusion as a 400m Sub-Four. The addition of this hill has subsequently been confirmed by LIDAR analysis, resulting in a 485.8m summit height and a 464.4m col height, with these values giving this hill 21.4m of drop. 400m Sub-Four total increases by one and confirmed as 146.
Kitley Hill 453.9m at NY 98938 05179
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Kitley Hill (NY 989 051) |
This deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with the post relating to its Hill Reclassification being published on Mapping Mountains on the 05.08.18. The hill was previously listed with an estimated c 20m of drop based on the 454m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 434m col height, based on interpolation of 10m contouring between 430m – 440m. Its deletion is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map. This mapping has 5m contour intervals enabling the estimated col height to be narrowed down when compared to the 10m contour intervals given on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps, resulting in it being listed with an estimated c 17m of drop. Its deletion was subsequently confirmed by LIDAR analysis, resulting in a 453.9m summit height and a 436.4m col height, with these values giving this hill 17.5m of drop. 400m Sub-Four total decreases by one and confirmed as 145.
Citron Seat 446.2m at NY 97799 10275
%20-%20LIDAR%20summit%202.jpg) |
| LIDAR image of Citron Seat (NY 977 102) |
This deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 30.07.18. The hill was previously listed with an estimated c 20m of drop based on the 446m summit spot height adjoined to a triangulation pillar that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 426m col height, based on interpolation of 10m contouring between 420m – 430m. Its deletion is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map. This mapping gives contour intervals at 5m which has enabled the height of the col to be narrowed down when compared to the 10m contour intervals given on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps, resulting in it being listed with an estimated c 18m of drop. Its deletion was subsequently confirmed by LIDAR analysis, resulting in a 446.2m summit height and a 428.6m col height, with these values giving this hill 17.7m of drop. 400m Sub-Four total decreases by one and confirmed as 146.
Brownberry 406.7m at NY 94069 20879
%20-%20LIDAR%20hill%201%20with%20col.jpg) |
| LIDAR image of Brownberry (NY 940 208) |
The deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post then appearing on Mapping Mountains on the 23.07.18. The hill was previously listed with an estimated c 20m of drop based on the 406m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger map and an estimated c 386m col height, based on interpolation of 10m contouring between 380m – 390m on the 1:50,000 Landranger and 1:25,000 Explorer map. This deletion of this hill is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map. This mapping has 5m contour intervals, resulting in the height of the col being amended to an estimated a c 388m, based on contouring between 385m – 390m, with these values giving this hill an estimated c 18m of drop, which is insufficient for its continued inclusion as a 400m Sub-Four. Its deletion was subsequently confirmed by LIDAR analysis, resulting in a 406.7m summit height and a 388.0m col height, with these values giving this hill 18.7m of drop. 400m Sub-Four total decreases by one and confirmed as 147.
Haystack 422.7m at NY 30062 01391
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Haystack (NY 300 013) |
The deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 16.07.18. This hill was previously listed with an estimated c 20m of drop based on the 423m summit spot height that appears on the Ordnance Survey Interactive Coverage Map hosted on the Geograph website and an estimated c 403m col height based on interpolation of 10m contouring between 400m – 410m that appear on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map. The deletion of this hill is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map. This mapping has 5m contour intervals with interpolation giving an estimated c 404m col height, based on contouring between 400m – 405m, with these values give this hill an estimated c 19m of drop. Its deletion was subsequently confirmed by LIDAR analysis, resulting in a 422.7m summit height and a 403.7m col height, with these values giving this hill 19.0m of drop. 400m Sub-Four total decreases by one and confirmed as 148.
Wansfell Pike 484.3m at NY 39415 04170
%20-%20LIDAR%20summit%201.jpg) |
| LIDAR image of Wansfell Pike (NY 394 041) |
The reclassification of this hill to Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 09.07.18. The hill was previously listed as a 400m Sub-Four with an estimated c 26m of drop, based on an estimated c 483m summit height ascertained from an optical survey taken from the summit area of Baystones (486.9m at NY 40312 05143) which concluded that Wansfell Pike is at least 4m lower, and an estimated c 457m col height based on 10m contouring between 450m – 460m that appear on the Ordnance Survey 1:25,000 Explorer map. The reclassification of this hill is due to the analysis of data on the OS Maps website, coupled with information in the OS Trig Database and LIDAR summit analysis. One of the resources recently available online is the mapping on the OS Maps website, this is the replacement for OS Get-a-map and until recent times had contours at 5m intervals which were proving consistently more accurate compared to the 5m contours that sometimes appear on the Ordnance Survey 1:25,000 Explorer map and used to appear on the online Vector Map Local. This mapping had col contouring between 450m – 455m, with interpolation placing the height of the col as an estimated c 453 - c 454. The OS Trig Database records the position of a buried block at the summit of this hill with a height of 483.717m, with initial LIDAR summit analysis giving a height of 483.7m, and when coupled with the estimated col height these values gave this hill an estimated c 30m of drop. With the reclassification subsequently confirmed by a Leica GS15 survey conducted by John Barnard, Jim Bloomer and Graham Jackson and analysis of full LIDAR coverage conducted by Myrddyn Phillips, resulting in a 484.3m summit height and a 453.5m col height, with these values giving this hill 30.8m of drop. 400m Sub-Four total decreases by one and confirmed as 149.
Little Meldrum 403.6m at NY 42201 22772
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Little Meldrum (NY 422 227) |
The deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published on the 24.04.18 by Mapping Mountains Publications, with a Hill Reclassifications post appearing on Mapping Mountains on the 04.07.18. The hill was previously listed with an estimated c 20m of drop, based on the 404m summit spot height that appears on the Ordnance Survey 1;25,000 Explorer map and an estimated c 384m col height based on interpolation of 10m contouring between 380m – 390m. This deletion is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map. This mapping has 5m contour intervals resulting in an estimated c 16m of drop. The deletion of this hill has subsequently been confirmed by LIDAR analysis resulting in a 403.6m summit height and a 385.1m col height, with these values giving this hill 18.6m of drop. 400m Sub-Four total decreases by one and confirmed as 150.
Pt. 465.1m 465.1m at NT 83019 14191
 |
| Pt. 465.1m (NT 830 141). Photo: Rob Woodall |
The reclassification of this hill to Four status was announced when the 2nd edition of The Fours was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 22.06.18. The hill was previously listed as a 400m Sub-Four with an estimated c 28m of drop based on the 465m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 437m col height, based on interpolation of 10m contouring between 430m – 440m. The initial reclassification of this hill is due to analysis of data on the OS Maps website, which is the recent replacement for OS Get-a-map, with confirmation from subsequent LIDAR analysis conducted by Myrddyn Phillips. The mapping on the OS Maps website has 5m contour intervals resulting in this hill being listed with an estimated c 32m of drop based on the 465m summit spot height and an estimated c 433m col height. The confirmation of this reclassification is due to LIDAR analysis, resulting in a 465.1m summit height and a 433.1m col height, with these values giving this hill 32.1m of drop, which is sufficient for it to be classified to Four status. 400m Sub-Four total decreases by one and confirmed as 151.
Pt. 423.9m 423.9m at SX 75331 76844
%20-%20LIDAR%20hill%205.jpg) |
| LIDAR image of Pt. 423.9m (SX 753 768) |
The addition of this hill to 400m Sub-Four status was announced when Mapping Mountains Publications published the 2nd edition of The Fours - The 400m Hills of England on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 13.06.18. The hill was previously listed with an estimated c 18m of drop, based on the 422m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map and an estimated c 404m col height, based on interpolation of 10m contouring between 400m - 410m. Its addition is due to LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips, resulting in a 423.9m summit height and a 403.2m col height, with these values giving this hill 20.7m of drop, which is sufficient for 400m Sub-Four status. 400m Sub-Four total increases by one and confirmed as 152.
Shovel Down 432.8m at SX 65837 85738
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Shovel Down (SX 658 857) |
The deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 07.06.18. The hill was previously listed with an estimated c 21m of drop, based on a 435m summit height and an estimated c 414m col height, with the latter based on interpolation of 10m contouring between 410m - 420m. The 435m summit height was taken from what was presumed to be a 1,427ft (434.954m) height that appeared on the Ordnance Survey 1:10,560 map. However, the last figure of the imperial height was blurred and a ? was added to the hand written notes accompanying the listing of this hill. The Ordnance Survey 1:10,000 series of maps has this figure as 1,421ft (433.126m). Its deletion is due to LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips, resulting in a 432.8m summit height and a 413.4m col height, with these values giving this hill 19.3m of drop, which is insufficient for it to retain its 400m Sub-Four status. 400m Sub-Four total decreases by one and confirmed as 151.
Merripit
Hill 449.7m at SX 65782 80369
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Merripit Hill (SX 657 803) |
The deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 02.06.18. The hill was previously listed with 20m of drop, based on the 449m summit spot height and the 429m col spot height that appear on the contemporary Ordnance Survey 1:25,000 Explorer map. Its deletion is due to LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips, resulting in a 449.7m summit height and a 430.0m col height, with these values giving this hill 19.7m of drop, which is insufficient for it to retain its 400m Sub-Four status. 400m Sub-Four total decreases by one and confirmed as 152.
High Nook 486.0m at NY 12033 18915
The deletion of this hill from 400m Sub-Four status is due to LIDAR analysis conducted by Aled
Williams and was announced when the 2nd edition of The Fours was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post
being published on Mapping Mountains on the 29.05.18, the hill was previously
listed with 21m of drop based on the 488m summit spot height that appears on the
Ordnance Survey 1:25,000 Explorer map and the 467m col spot height that appears
on the Ordnance Survey Interactive Coverage Map hosted on the Geograph
website. The LIDAR analysis has resulted in a 486.0m
summit height and a 466.1m col height, with these values giving this hill 19.9m
of drop, which is insufficient for its continued inclusion as a 400m Sub-Four. 400m Sub-Four total decreases by one and
confirmed as 153.
Knott 429.7m at SD 67644 94087
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Knott (SD 676 940) |
The deletion of this hill from 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on Mapping Mountains on the 25.05.18. The hill previously listed with an estimated c 20m of drop based on the 429m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 409m col height, initially based on contouring between 400m – 410m and then 405m - 410m, with the latter appearing on the interactive mapping on the OS Maps wesite. The deletion of this hill is due to LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips, resulting in a 429.7m summit height and a 410.0m col height, with these values giving this hill 19.7m of drop, which is insufficient for it to retain its 400m Sub-Four status. 400m Sub-Four total decreases by one and confirmed as 154.
Pt.
431.1m 431.1m at NY 30843 04224
%20-%20LIDAR%20hill%204.jpg) |
| LIDAR image of Pt. 431.1m (NY 308 042) |
The deletion of this hill from 400m Sub-Four status was announced on the 24.04.18 when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications, with a subsequent Hill Reclassifications post appearing on Mapping Mountains on the 21.05.18. Its deletion is due to LIDAR analysis conducted by Aled Williams. The hill was previously listed as a 400m Sub-Four with an estimated c 20m of drop based on interpolation of the uppermost 430m summit contour that appears on the Ordnance Survey 1:25,000 Explorer map and the 411m col spot height that appears on the Ordnance Survey Interactive Coverage Map hosted on the Geograph website. Therefore, the deletion of this hill from 400m Sub-Four status is due to LIDAR analysis, resulting in a 431.1m summit height and a 412.7m col height, with these values giving this hill 18.4m of drop, which is insufficient for it to retain its 400m Sub-Four status. 400m Sub-Four total decreases by one and confirmed as 155.
Black Hill 468.2m at SD 86565 66233
%20-%20LIDAR%20hill%203.jpg) |
| LIDAR image of Black Hill (SD 865 662) |
The reclassification of this hill to 400m Sub-Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassification post appearing on Mapping Mountains on the 18.05.18. The hill was previously listed with an estimated c 30m of drop, based on the 468m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and an estimated c 438m col height, based on interpolation of 10m contouring between 430m - 440m. Its reclassification is due to LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips resulting in a 468.2m summit height and a 440.0m col height, with these values giving this hill 28.2m of drop, which is insufficient for it to retain its Four status. 400m Sub-Four total increases by one and confirmed as 156.
Green Hill 419.7m at NY 85366 53385
%20-%20LIDAR%20hill%202.jpg) |
| LIDAR image of Green Hill (NY 853 533) |
The reclassification of this hill from 400m Sub-Four to Four status was announced when the 2nd edition of The Fours - The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18, with a Hill Reclassifications post appearing on the Mapping Mountains site on the 15.05.18. The hill was previously listed with 28m of drop based on the 419m summit spot height that appears on the Ordnance Survey 1:50,000 Landranger map and the 391m col spot height that appears on the Ordnance Survey 1:25,000 Explorer map. Its reclassification is due to LIDAR analysis conducted by Aled Williams, resulting in a 419.7m summit height and a 389.7m col height, with these values giving this hill 30.0m of drop which is sufficient for it to be classified as a Four. 400m Sub-Four total decreases by one and confirmed as 155.
Cold Stones c 417m at SE 123 636
THIS
HILL HAS SUBSEQUENTLY BEEN RECLASSIFIED TO FOUR STATUS
The addition of this hill to 400m Sub-Four status was dependent upon re-interpolation of Ordnance
Survey map data coupled with studying Aerial maps and Google Street View, with
its addition announced when the 2nd edition of The Fours was published on Mapping Mountains Publications on the
24.04.18, with a Hill Reclassifications post published on Mapping Mountains on the 13.05.18. The hill once
qualified as a P30, but due to quarrying activity its drop value was estimated
to be c 12m with details to it appearing in Appendix I in the 1st
edition of The Fours (Europeaklist
December 2013), however these details have been re-evaluated and the hill is
now listed with an estimated summit height of c 417m and a col height of 491m,
with these values giving this hill c 26m of drop, which is sufficient for it to
be classified as a 400m Sub-Four. 400m
Sub-Four total increases by one and confirmed as 156.
Reilth Top 404.6m at SO 28458 88105
 |
| Gathering data with the Trimble GeoXH 6000 at the summit of Reilth Top (SO 284 881) |
The reclassification of this hill to 400m Sub-Four status was announced on the Mapping Mountains site on 25.04.17, with the Hill Reclassifications post published on Mapping Mountains on the 27.04.17. The hill had previously been listed as a Four with an estimated c 30m of drop, based on an estimated c 406m summit height with uppermost ring contouring of 405m on the contemporary Ordnance Survey 1:25,000 Explorer map and an estimated c 376m col height, based on interpolation of 5m contouring between 375m – 380m. Its reclassification is due to a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips on the 25.03.17 and confirmation via subsequent LIDAR analysis conducted by Aled Williams, resulting in a 404.6m summit height and a 375.4m col height, with these values giving this hill 29.2m of drop. 400m Sub-Four total increases by one and confirmed as 155.
6th
January 2014 – Haroldstreet publishes The
Fours.
400m
Sub-Four total confirmed as 154.
15th
December 2013 – Europeaklist publishes The
Fours.
400m
Sub-Four total confirmed as 154.
Myrddyn Phillips and Aled Williams (February 2017)
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