An audience favourite at festivals, James Lees’s Pockets is a tiny treasure that asks a simple question of Londoners passing by on the street: What’s in your pocket? The answers are both familiar and surprising. Some people keep sentimental trinkets, like lockets and old photographs, and keys that no longer open any doors. Others carry crack pipes and cigarettes, and the results of STD screening tests. One man produces a handful of old mushrooms he uses to guard against evil spirits, ‘because in this country there are many evil spirits you can’t see.’