Bitbargain.co.uk S it's one of the only website I can find that sells to the UK without needing ID and ask that. I ended up losing my provisional drivers license one night when I was drunk and still haven't got round to replacing it.
Bitbargain is actually a pretty good website. Transaction always go smoothly. Never had any problems.
I think, none of the above requires an ID and all of them cater UK.