The real killer of art, Ryan Gander suggests, is procrastination. His solution is always to act on ideas “before they lose their energy”. His studio, in a former register office and sports hall in the Suffolk village of Melton, is living proof of that determination. Before we sit and talk, he gives me a tour. In one room are the moon paintings he is making for an exhibition in Tokyo, some using paint prints from upturned tables in a Chinese restaurant; in another are some of his draped mirror series in which the reflection-obscuring fabric is cast in marble; here...