>>328 Theatre going is a pap-free activity in London because too many theatres for them to stake out and even if people tweet you're there, loads of exits and a big crowd leaving together, so hard to get your target.
Pap-friendly restaurants don't have crowds of paps waiting to take your pic when you go in - they get them when you come out (target usually drunk and it's dark so a more dramatic picture). It's always x leaving the Chiltern Firehouse. Also of course you have to hang around on spec to catch someone going in; you may get a tip-off while they are there so you can more easily catch them going out.
Apparently there were tweets that they were there - I haven't seen anyone link to them but if there were, paps descend therefore probably not a set-up. But it can hardly have been a surprise.