Photographs of Unsuspecting Londoners by Benjamin McMahon

As a photographer working across art, fashion, and print media, Benjamin McMahon spends much of his working life trying to establish a connection with his subjects – be they award-winning actors, retail tycoons, renowned artists or politicians. “I usually get between five minutes and an hour to make a portrait of someone, and there's lots of chatting, and moving around, and energy required to make something from that time,” he…