London Premiere

So like a good exciteable fanboy, I'm applying for every competition to win tickets to the Premiere in London. In the unlikely event I don't win (yeah right... :whatever: ) I'm thinking I might duck out of work early and go into London and see what's going on.



I've never done this before so I'm just wondering what goes on at these things? Do I need to get there like 4 hours early? Or can I rock up an hour or two before the Premiere and just hang around?