'Will we be safe here?' asked a German man sitting next to me in the front row. We were about to see Leave. To Remain (An Aristophanic Brexit Tale), a Fringe production modelled on Aristophanes’ Acharnians, whose protagonist, Dikaiopolis, makes a private peace treaty with Sparta while the rest of Athens remains at war. My neighbour was worried we'd be expected to take part in the show. It's set in a not too distant, post-Brexit future, where the British equivalent of Athenian direct democracy is interactive TV programmes.

