As I add this to my list, I'm a bit shocked to realise I watched the movie recently without having any idea I'd seen the play in 2007. I can see that is partly because the movie could muck about the the play, but I rather suspect I must have slept through part of the play.
Redstitch is a tiny theatre, seating about 60 now, but back then maybe 30. One is practically part of the set, sitting in the audience. The cast is very decent about nodding off.