In reply to Matthew Newhouse:
I wouldn't worry about seepage on any of the Mag lime crags at the moment, it's been so dry it will take more than a few showers to have any effect. Ive climbed at Anston, Roche Abbey and Pleasly in the rain this time of year, the steepness keeps them pretty sheltered. High humidity however can be an issue sometimes if its warm, wet and not much breeze. Occasionally you might get the odd damp pocket, but limestone bouldering is minging anyway.