In reply to JoeTompkins:
Easy sport will tend to narrow down the choices a bit. So for instance the Peak District has tons of bouldering of all grades but for lower grade sport you might end up in a big ugly quarry which might not be what you are after, unless that's you thing of course. The Yorkshire Dales has some quite good lower grade sport crags like Robin Proctors Scar, Moughton Nab (granted that is above a big quarry) and Giggleswick and is not that far (depending on what you consider far) from some good gritstone bouldering places such as the crags above Skipton or a bit further away Brimham, Almscliff, Caley. Will you have your own transport?
I know there has been a lot of sport developed in N Wales but can't comment on the grades.
Post edited at 10:07