From watching the BBC news 10 mins ago I wouldn't bother (not that I would consider nicking stuff anyway), apparently tonight the police are having a crack down in an attempt to clear as much as possible. Also, some of the stuff washing up in the containers are peoples personal belongings from house moves etc. The sort of stuff you can't replace and insurance money can't buy so I'd think carefully.
Besides, you're too late, all the BMW motor bikes went last night!
There's another thread on this already:
Anyone know why the hell they can't get it into Portland Harbour? - edit, cos it started to break up.