In reply to The Pylon King:
Some cleaning is definitely required - but that photo is a bit of a cheeky sales pitch ...having climbed there on Sunday and done some minor cleaning myself I know that shot is one from the PK archives!
If cleaning days are planned I'll be along if available, perhaps post suggested dates to this thread, it is a great venue when clean and dry.
Right now the trees are still greener than in the photo and although moss is encroaching on the "Baran" slab and the slab with "No birds do sing" the start of "The Quarry Effect" (pictured) is actually not too bad. Brambles on "Butch and Sundance" need dealing with and in general cracks and ledges need brushing/scraping to remove peaty debris.