Australian sound artist and photographer Paul Schütze exhibits a dazzling set of images at the Alan Cristea Gallery. Twilight Science sees Schütze at his best; devoid of artificial light, his photographs linger on floating particles and ephemeral presences. The display includes the Nocturnes series, which explores what eminent British museums look like after closing time — but Schütze also gets abstract in his experiments, with materials such as smoke, calligraphy ink, and gelatine.