The UK's coastline is brilliant for this as its not just one long flat beach, instead is covered by rocky features. Depending on where in the UK you go will change whats involved ever so slightly.
Both sites have massive caves, one of them having a duck under joining two caves together, (if the sea conditions are right).
If its jumps you enjoy, both have their equal share, boasting high jumps of about 6-7m at both sites, with hedbury having a jump over a cave which when standing on the edge seem much higher than it actually is!
My favourite features, (specific parts of a site), though are ones where you stand/sit and let the water move you around. The best I think being the big gauntlet at dancing ledge, which is a corner in the rock, with a ledge under the water that you can stand on. This underwater ledge makes the waves break, releasing their power on you standing there. (Its a lot more fun than it sounds!)
A full list of providers can be found here:
http://www.nationalcoasteeringcharter.org.uk/download/dorset-providers-2/?wpdmdl=1014