So my favorite place in London (England) for discount theatre tickets is TKTS half-price ticktes located in Leicester Square, it’s sort of in the park so you can’t miss it.
I discovered they list the available tickets on-line so that’s a bonus for next trip, no reason to rush down for tickets if there isn’t anything you like!
They are opening a second location in the Brent Cross Shopping Centre officially on June 29, 2008 but since I’m not there I can’t go check it out (that’s today!). I think they carry the same tickets at both locations.

