MyQul
Chairman of the Bored
Why don't you try mudlarking on the Thames foreshore M? Loads to find and no outlay for any kit as you can just do "eyes only" searching for surface finds.
I tried that a few years ago. I even bought a little trowel . But the Thames foreshore mud absolutely stinks. Also now you have to get a permit from the London port authority to mudlark. They cost about £32