I just came through London on United and all in all - pretty much the same experience as I always have. The line for security - Fast Track and economy - is ridiculously long at Terminal 3. Give yourself an hour - at least! The security felt the same - less intense than the U.S. - though I didn't take off my shoes or belt, I got frisked when the metal detector went off. I also didn't see anyone with more than one piece of luggage. Certainly no heavy handed stuff about keeping everything in one piece. When I got to Gate 16 - I went through the Star Gold/Business/First/UGS entrance which is less restrictive then the other main entrance. They don't do secondary searches for P1's/Star Gold/Business, etc. And I got upgraded from E+ - always a nice surprise and good thing.