wow, quite far then, just be careful on the cliffs, they're steeper than they look, i fell down them when i was about 14, ruined my mini skirt! they're are quite a lot of amusements on the seafront, and i know there used to be quite a decent market there, not sure what days though.
are you going for a week or weekend?
if you've got time, you could maybe travel to hull or beverly, it depends what kind of things you are interested in doing.