In reply to MikeSP:
There is a French term "Coventrisee", which means "to completely flatten", which was invented during the Blitz in World War Two. Although it alludes to the rather thorough work done by the Luftwaffe, it might as well have a connection to the surrounding landscape, which is remarkably, starkly, rock-free.
I have done an awful lot of tramping back forth around the fields and forests surrounding Coventry and Warwickshire with an eye and a half open for potential climbing, and although I have found a couple of worthwhile little outcrops that could do with a brush and a bouldering mat, some of them require a canoe approach and others would need either a golf club membership or cover of darkness. There is very little indeed higher than three or four metres. I fully intend to develop them into usable spots in the future, and I'll be adding them to the UKC database if and when appropriate, but seeing as I only spend a couple of weeks a year in the ancestral abode here in Warwickshire, it might be quite a while before they are ready.
If you trawl the database on here for crags near to Coventry, though, there are actually a few stone railway bridges and an old quarry listed, but I've never visited any of them myself, so I can't comment on their worth. I'd be massively keen to hear a report from them though!
Good luck!
Post edited at 17:48