Should Black Mountain be GW/SW-??? rather than G/WB-001? if the RHB is the standard reference for SOTA hills in the UK.
Quote 1 from May 2007 MARHOFN :-
Black Mountain (32C, LR161)
Tom Read: I always assumed this lay on the border between England and Wales, and hence could be arbitrarily placed in either. However, my visit there revealed that the summit cairn, which appears to be at exactly the right spot, is a full ten metres away from the English border (aka the Offa’s Dyke path), and is fully in Wales.
Quote 2 from RHB 2006 update :-
Changes since April 2002
Two new Marilyns were discovered and added in 2004-05: Meall Chomraidh and Arnside Knott. The number of Marilyns has therefore risen to 1554 - 1214 in Scotland, 179 in England, 156 in Wales and 5 on the Isle of Man (Black Mountain is on the border but counted in Wales).
Quote 3 Key to Marylin Hall of fame 31st December 2006
Key: S=Scotland, I=Isle of Man, W=Wales, E=England, M=Murdos, C=Corbetts, G=Grahams, D=New Donalds, H=Hewitts of England and Wales, T=Tops. *=Honorary member. Black Mountain is now deemed to be in Wales only.
As they say in all the best exam papers - Discuss