In reply to Graeme Hammond:
I agree the BMC should try to purchase them as well.
The link works for me... I searched "BMC buy Wilton" and it was about the 5th item.
"www.thebmc.co.uk › Downlo...PDF
BMC buy Wilton 1 quarry - The British Mountaineering Council'
It's the Feb 09 NW area newsletter and should be available through their community pages.