In reply to Tom Corner:
For the north of England, there are bouldering specific guidebooks which cover...
Yorkshire, Peak District, Churnet, Lancashire, Lake District, The North York Moors, Northumberland.
They are all great places, with different styles and several lifetimes of climbing. If you haven't done much outdoors, then you have a whole world to explore. Most people buy guidebooks and keep using them for decades, so if you are a keen climber you won't be wasting money. But if you can only afford one, get a local one first. Then plan a trip somewhere a bit further away, and get that one. And so on... have fun!