Sunday will be the
1st Annual Magic Game Day which will also be the release of
Tenth Edition.
On Sunday, Patriot is running their event from 11am. That's £12.50 for a sealed tourney (like the pre-release for those who went) using five 10th Edition packs.
Alternatively Wargames Emporium is running a similar thing on Saturday from 1:30, in
their Games Center near Meadowhall. It's only £10, but you'll only be getting four 10th Edition packs.
Personally I' prefer to go to the Patriot one because it's nearer, and five boosters is a way more sensible number for making a deck from (you're likely to need quite a big third-colour-splash with one four boosters), but if plenty of people want to go to the Saturday one I'd be fine with going to that one as well/instead.
People interested?