Portable loos at the Glastonbury festival are delivering charitable messages from Water Aid to music fans, using the voices of Brian Blessed, Kathy Burke and Cerise Matthew’s, to raise awareness of the 2.3 billion people worldwide who have no access to a basic toilet.

Some of the doors in the low cubicles have been fitted with two way mirrors, which give the impression to those sitting inside that they are visible from outside, while those outside just get their own reflections, the idea being, say Water Aid, to highlight those who have nowhere safe to go to the toilet by making those using the cubicles feel “exposed”.