Looks like the celebs and residents of London crossed over to the dark side last night and meddled in the dark arts, Sir Tom Jones, Wretch 32, VV Brown and Razorlight led 1,000s of Londoners in a remarkable toast for Arthur's Day 2012.

There was not a dry eye (or glass) at the event as they gathered to honour the great man behind the pint, Arthur Guinness. Cheers!