In reply to Scott the flash Johnson:
If youre ever desperate to climb on a horrible, wet day there are a few reliable spots. New Mills Torr is very good, has almost perma dry trad, bouldering & sport and is even floodlit. It almost always has something dry. Stoney bouldering particularly Tom's Roof. Hard sport climbing is often handy when it's wet, particularly Malham. All threw of these place have saved me recently.
Also check forecasts of places further away. Depending on where you are there's a lot of the UK close enough for a day trip. Welsh Slate is good in winter as a lot of the routes dry really quickly. Also, although the lakes has a reputation for being wet, it often has different weather to more inland places.
I climb pretty much every weekend and have only had one weekend which was 'no outdoor climbing'. I ended up going I doors only to find out that Malham had been glorious lol.