In reply to Robbiobaby:
I may be teaching you to suck eggs, but it's best to keep off the sandstone when it's wet (or damp), holds snap, footholds erode and ropes groove the tops. Kyloe Out and Back Bowden are the obvious venues where it may stay dry under the low overhangs. Depending on the direction of the rain, and it's intensity Heckley may work.