Sonson’s brother, Aaron, 23, didn’t want to go on the course initially. “I’m not really a techie person, not into computers and all that stuff.” He missed the first day, but decided to go along on the second. “It’s crazy, it shows how little decisions can affect your whole life.” Six months on, he now teaches the course, and, together with Satwant Kenth and Gregory Paczkowski, developed the Stop and Search app, which aims to make the search process fair and transparent. There is a comic strip that tells users what their rights are and they can then go on to rate their experience. Their feedback becomes a marker on a Google map so that patterns can be detected.