In reply to david14: I was once down in Llanberis with a crowd including a very young and very keen Al Rouse. It was absolutely sheeting it down and not a soul would venture further than the Padarn, not even to go for a walk. Eventually Al came up to me and said I can't stand this, come and do something with me Al or I'll go mad and go soloing.
It was a threat I couldn't ignore so we got the gear together and trooped off up the pass which was deserted. Al chose Trilon and fearlessly led the big rib pitch in the monsoon weather. I don't know what it is graded now, but then it was VS 5a and I remember thinking as I followed it, soaked to the skin, that it was not a great choice as a waterfall to climb.
Al was an unknown young lad then, but on that day I realised he was going to be one of the greats of UK mountaineering!