The best thing I saw at Edinburgh this year was The Sleeper, written and directed by Henry Krempels. (The play will be on for one night only in London, at the Rosemary Branch Theatre on Thursday.) Karina, played by Michelle Fahrenheim, is a Londoner travelling on an overnight train somewhere in Europe. She’s a writer, probably a Guardian reader, definitely a Remainer. Returning to her compartment after brushing her teeth, she finds someone else in her bunk. She rushes to the guard in a panic. The young woman hiding in her berth, Amena, is a Syrian refugee. She will be kicked off the train at the next stop.