Hi there
I queued last year with my friend and got there 8am for the 6pm launch. I think we were about 30th in the queue.
I rang Meadowhall Apple Store yesterday and the guy said it'd probably be an 8am launch this time like the iPhone 4S, and there's been news today that it's 8am in the states. He did say he wasn't 100% certain and to call a bit later in the week.
I'll be driving down from Hull so it looks like I won't be getting any sleep Thursday night!
Edit: Just thought, 8am EST is 12pm GMT. Midday launch?