BitMint?
You mean Bitmit.net? If so, I've used it on a few occasions to buy some gold and other bits and bobs.
I'm in the UK too and you're right, there is not a lot being offered, but I think it hasn't had much exposure/advertising.
I've never had any issues with it, but watch out for scams.
Yeah thats the one. It looks like the ebay of bitcoin. Did you use the escrow?
Cheers