In reply to BusyLizzie:
Fair one! The Mendip Quarries are not ideal for the Diff / VDiff climber - it tends to either be steep, strenuous or chossy (or sometimes all of the above). There is some stuff at Cheddar in that range, but it's not great. Ubley Warren and the Charterhouse outcrops have some good fun short stuff that can be climbed at just about any grade. Portishead Quarry has a couple of Diff / VDiff routes.