Change
Register
The
Fours – The 400m Hills of England
390m
Double Sub-Fours
On the 10th July 2024 it was announced that the 390m Double Sub-Fours have been dispensed with, therefore the Change Registers for these are now redundant. However, they will remain on Mapping Mountains as a historical documentation of this list, although their totals will no longer be used.
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
and this Change Register details those hills that are, or have been listed
within the 390m Double Sub-Four category.
The 390m Double Sub-Fours
are those hills that fail to meet qualification to the main list by less than 10m of height and also less than 10m of drop, these
are the hills that are 390m or more and below 400m in height that have 20m or
more and below 30m of drop.
When this sub category was first published in December 2013 by Europeaklist, there were 21 hills listed that met the qualification
for 390m Double 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 two other sub categories; the 390m Sub-Fours and the 390m Double 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 390m Double 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 390m Double Sub-Fours appears below
with the reclassifications to the list detailed chronologically in
receding order.
Change
Register
The
Fours – The 400m Hills of England
390m Double
Sub-Fours
On the 10th July 2024 it was announced that the 390m Double Sub-Fours have been dispensed with, therefore the Change Registers for these are now redundant. However, they will remain on Mapping Mountains as a historical documentation of this list, although their totals will no longer be used.
Silver Howe 393.8m at NY 32477 06643
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Silver Howe (NY 324 066) |
The
reclassification of this hill from 390m Sub-Four status to 390m Double Sub-Four
status was announced in a Hill Reclassifications post published on Mapping
Mountains on the 14.11.22. When the 2nd
edition of The Fours – The 400m Hills of
England was published by Mapping Mountains Publications on the 24.04.18
this hill was listed with an estimated c
31m of drop, based on the 395m summit spot height that appears on the Ordnance
Survey 1:25,000 Explorer map, and an estimated c 364m col height based on
interpolation of 5m contouring between 360m – 365m that appeared on the OS Maps
website. Its reclassification was prompted
by Joe Nuttall who produced a summit analysis programme using LIDAR, and
confirmed by LIDAR analysis conducted by Myrddyn Phillips, resulting in a 393.8m
summit height and a 364.1m col height, with these values giving this hill 29.7m
of drop. Double Sub-Four total increases by one and confirmed as
23.
Countess Cliff 388.7m at SK 05360 71003
%20-%20LIDAR%20hill%201.jpg) |
| LIDAR image of Countess Cliff (SK 053 710) |
The deletion of this hill from 390m Double Sub-Four status was announced with a retrospective Hill Reclassifications post published on Mapping Mountains on the 26.09.22. When the 2nd edition of The Fours – The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18 this hill was listed with an estimated c 22m of drop, based on the 390m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map, and an estimated c 368m col height based on interpolation of 5m contouring between 365m – 370m. Its deletion is due to Joe Nuttall who produced a summit analysis programme using LIDAR, with subsequent LIDAR analysis conducted by Myrddyn Phillips, resulting in a 388.7m summit height and a 368.05m col height, with these values giving this hill 20.65m of drop. Double Sub-Four total decreases by one and confirmed as 22.
Standing
Stone Hill c 399m at SD 95042 30320
This
hill’s addition to Double Sub-Four status
was announced in a Hill Reclassifications post published on Mapping Mountains on the 23.08.20. When the 2nd
edition of The Fours – The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18
this hill was not included although it was provisionally listed with 20m of
drop. Its addition is due to JoeNuttall’s summit analysis programme which has documented 29600 hills and
evaluation of the resulting spreadsheet by Ronnie Bowron, resulting in this
hill now listed with c 22m of drop based on an estimated c 399m summit height relative to the 398m height adjoined to a triangulation pillar and an estimated c 377m col height based on
interpolation of 5m contouring between 375m – 380m that appear on the OS Maps
website. Double Sub-Four total increases by one and confirmed as
23.
Lord’s Seat 392.2m at NT 91281 07968 and NT 91282 07966
 |
| LIDAR image of Lord's Seat (NT 912 079) |
The
reclassification of this hill from 390m Sub-Four to 390m Double Sub-Four status was announced in a HillReclassifications post published on Mapping Mountains on the 31.07.20. When the 2nd edition of The Fours – The 400m Hills of England was published by Mapping Mountains Publications on the 24.04.18 this hill was
listed with an estimated c 53m of drop, based
on the 392m summit spot height and an estimated c 339m col height based on
interpolation of 10m contouring between 330m – 340m that appear on the Ordnance
Survey 1:50,000 Landranger and 1:25,000 Explorer map. However, as LIDAR analysis initiated by Joe
Nuttall and subsequently Jim Bloomer gave the adjacent hill of Green Side (NT
906 076) as higher the details for this hill were re-assessed by LIDAR analysis
conducted by Myrddyn Phillips, resulting in a 392.2m summit height and a 370.9m
col height, with these values giving this hill 21.3m of drop, which is
insufficient for 390m Double Sub-Four status.
390m
Double Sub-Four total increases by
one and confirmed as 22.
24th
April 2018 – Haroldstreet publishes The
Fours.
390m
Double Sub-Four total confirmed as 21.
24th
April 2018 – Mapping Mountains Publications publishes The Fours.
Silver Howe 395m at NY 32477 06643
THIS HILL HAS SUBSEQUENTLY BEEN RECLASSIFIED TO 390m DOUBLE
SUB-FOUR STATUS
The reclassification of this hill to 390m 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
appearing on Mapping Mountains on the 27.06.18, the hill was previously listed
as a 390m Double Sub-Four with c 28m
of drop based on the 395m summit spot height that appears on the Ordnance
Survey 1:25,000 Explorer map and an estimated col height of c 367m based on 360m
– 370m col contours at 10m intervals.
This hill’s reclassification 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 narrowed down, and with an
estimated col height of c 364m, based on interpolation of contours between 360m
– 365m, these values give this hill c 31m of drop, which is sufficient for it
to be classified to 390m Sub-Four status. 390m Double
Sub-Four total decreases by one and confirmed as 21.
West Nab 395m at SK 26605 93980
 |
| (L-R) Ed Gradwell and George Gradwell on the summit of West Nab. Photo: David Gradwell |
The 04.02.14 addition of this hill as a 390m Double Sub-Four was the first ever hill whose reclassification
was announced on the Mapping Mountains site, the hill has a 395m summit spot
height on the Ordnance Survey 1:25,000 Explorer map and an estimated col height
of c 372m based on col contouring between 370m – 375m, these values give this
hill c 23m of drop, and when coupled with its height is sufficient for it to
qualify as a 390m Double Sub-Four. The omission of this hill from this category
was brought to the attention of the authors by George Gradwell, and it was
George’s brother; Ed Gradwell who identified that this hill should be included
in this sub category. 390m Double Sub-Four total increases by
one and confirmed as 22.
6th
January 2014 – Haroldstreet publishes The
Fours.
390m Double
Sub-Four total confirmed as 21.
15th
December 2013 – Europeaklist publishes The
Fours.
390m
Double Sub-Four total confirmed as 21.
Myrddyn Phillips and Aled Williams (February 2017)
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