Royal Shakespeare Theatre
Waterside, Stratford-upon-Avon, Warwickshire
100% positive
Directions: Go through the main entrance (the side with the shop) and turn left - you'll find an elevator. Head up to floor one, and the toilets are directly in front of you.
Comments: The bathroom is named 'accessible bathroom' and has a sign saying something along the lines of 'please respect that people may have many different reasons for using this bathroom.'