In reply to J_Climbs:
Sussex Coast:
Most people climb at Saltdean. Routes have in-situ pro and lower-offs. Top-roping is possible only if someone leads a route first. Some of the pro is fairly rusty so big falls are not advisable. You need crampons/ice axes. Climbing is a bit like dry tooling but you sometimes need to kick the feet in a bit more as with ice. Crampons need to be mono-points so as not to damage the holds. Very important that new holds are not made (unless a section of the route has fallen off). There's some good low-level traversing but best have a spotter for overhung sections (I learnt this last week) in case a hold blows unexpectedly.
There's also some trad stuff at Hastings that is either climbed with rock shoes or ice gear depending on the specific venue. Can't comment too much as haven't visited Hastings yet. There's also some trad at Beachy Head if you are happy climbing XS 5c (not me). Again I can't comment on these routes as simply not a good enough rock climber to consider.