Make sure you go to the toilet before you go in. At the interval there is a massive queue. Yes fellas, for the gents! God knows how queue was for the ladies. Go pee, then enjoy the show.
Be sure to book a lounge package (from £15pp) - complimentary drink and cloak room, table service and a nice relaxing place to enjoy a drink before the show and at the interval
Just DON'T need the toilet. Horrifically under-services theatre with huge queues and narrow corridors. A real let down for the venue which can ruin visits to shows.