There are some nice shots here, although not enough to last more than a coffee break.

(Needs Flash.)

http://www.abandonedwrecks.co.uk/index.html

I've visited the Hoo Peninsula, mainly for the wrecks. I ought to make the trip again, as it's not that far away.

I prefer wrecks under the waves, but I find these, acceptable.

I find them accessible - not being gifted with the skills of aqualung.

Also, bear in mind the water consistency in most estuaries around the UK is that of hot chocolate. Having a wreck beached means it can be seen without the aid of sidescan sonar!