He covered 900 miles over four months to create Oranges and Lemons, a recital of the famous nursery rhyme painstakingly assembled from photographs of London road signs. His enemies were poor light, punctures and police moving him on. His method leaves no room for error. Each image must appear in the proper order when strips of transparencies are laid out side-by-side on a light box for exhibition. If a single image on a 36-exposure film is wrong, he has to start again. “It can be fantastically frustrating when you lose weeks of work,” he says, “My methods are a reflection on obsessive behaviour, collecting and problem solving. But most of all I am fascinated by the urban and on rearranging what is around us.” His most recent work Modern Art spells out the message ‘Modern Art is rubbish’ in gorgeous colours photographed on food wrappers dropped on the pavements and gutters of the capital. Mr Wilson says: “It articulates a common belief, is derived from rubbish, and is beautiful.” Once round the Sun, an earlier work, consists of images of 24 clocks around the capital, each photographed at a successive hour in a 24-hour cycle across an entire year. “It records the growing and dying of the light in the city,” Mr Wilson says.