A young man called Ishmael, with a wispy black beard and a slight blemish in one eye, is telling me why women should be covered up and kept apart.
"If I had two sweets – one wrapped and one unwrapped – and threw them in a bin, which one would you pick out and eat?" He grins, the amateur philosopher pleased with his analogy, and breaks off to shake the hand of a young man walking past the makeshift London Metropolitan University Islamic Society stall set up in the student canteen. Ishmael, who says he is a former head of the society (something the current president later denies) appears to know a lot of the students passing through.
"Women are man's great temptation," he turns back to face me. "They should be covered up."