In reply to Liam Brown:
So many great crags. Be aware that often the grades are really soft up there, so look at the classic E2s too, and some of the E3s if you go to Reiff (they're actually more like HVS). All been mentioned, but:
Diabaig Pillar is a cracker and a steady E1, but like VIM says, do every route there if you can, it's amazing.
Sheigra is completely awesome, and apart from Bloodlust Direct which has quite a run-out, the E2s are all more like E1. Geriatrics is up there with the best routes I've ever done, but they're all fantastic.
Jack The Ripper is unmissable - one of the best E1s in the UK?