There are some very good grit crags in yorkshire. Namely caley and earl.
Christobal - Stay in Sheffield. The South East of the city is best for proximity to the crags
Just as Jim is taking on a grammar policing role, I'd like to remind folk that geographically the best of gritstone can be found in Derbyshire and North Yorkshire (not 'Southern' or 'Westie' Yorkshire!)
So where does that leave us?