There are two places I know of and they're along way from you. Inner Farne, Northumberland (photo) and Fair Isle Shetland in early June - GUARANTEED. I don't think the views at Lundy are that close from what I remember. Bempton Cliffs in Yorkshire can be OK, but not like Inner Farne. If you do go to Inner Farne wear a stiff hat because you get bombarded by Arctic Terns as you get off the boat. See below