The prolific British conceptual artist on the source of his creativity, why he left London – and a coin-based treasure hunt he is making for Manchester’s international festivalThe real killer of art, Ryan Gander suggests, is procrastination. His solution is a…

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 …