In the lakes over the weekend saw a big bird of prey from a distance(buzzard sized) but a predator rather than a scavenger, we saw it dive on a bird and easily see off a couple of crows/ravens? It had distinctive white banding on it's wing tips but on checking my bird books the nearest would seem unlikely, (not wanting to pre empt a possibility)

One of the walkers was a "bit of a birdy" but he didn't know.

ideas? it was up Langstrath at the end of Borrowdale just incase any one local knows.