For those of you who like to know the timings of the shows you attend, for travel purposes, here are the proposed timings for the shows (22-25 July) :
Act 1 – 53 minutes
Act 2 – 48 minutes
So with a 7.30pm start, the first Act will end at (approx) 8.23pm, with an interval (unspecified length but presumed to be 30 minutes), the second Act will commence at 8.53pm and finish at 9.41pm.
When I had a look this morning, online booking was showing only a few seats left. You can find more detail about the shows, including the rep, here.