Following a lengthy recovery from a knee injury I'm keen to get into hiking properly, but as somebody who lives in London and can't drive I'm running into quite a few logistical problems.

Has anyone got any good recommendations for places that don't specifically need a car to get to? Or good campsites that are a (all good if its long) walk from a train station?

I've got a pedal bike and a few places narrowed down, but I thought I'd ask because there's probably a few good spots I've missed!

I'm relatively fit and healthy and have done a few 1000-1400m mountains as a reference for capability, though I do love an easier day hike too. Thanks!