Well, I'll reply for Wembley. For Hyde Park I don't think we bothered getting there particularly early, probably about 2-3pm earliest, and we still got great positions ... might go in a bit earlier this time, for the morning I guess, 10 or 11 am sounds reasonable ... although you tend to lose your position anyway when you go to the toilet or to get some food or merchandise or whatever, and everyone just tends to walk through the crowds alot of the time