The UK's biggest gaming festival will host a ton of vendors and more games then you can shake a stick at. Starting from April 22nd - 25th, it will be at Newbury Racecourse Newbury, Beckshire. Starcraft 2 tournaments, the ability to play Brink and tons of other cool things.
Check out the official site here for more information regarding ticket price, vendors and other great events. If anyone from the UK goes, let me know, I would lost of post/host your story here on my blog. (I'm from the USofA)
Enjoy you crazy Brits! :p