In reply to desperate:
There is a wall search facility on here which will give straight distances. I tend to look west rather than east though. That means Ingleton (about 35-40 mins), Burnley (about 30-35 mins), West View in Preston (about 45 mins) and perhaps Rochdale/Blackburn, which are reachable although I've not visited them.
There will be folk on to recommend the Leeds walls, no doubt, in a minute. Skipton is pretty equidistant from most of the options.