Lying on a footbridge spanning Londons River Thames, Ben Wilson finalizes his latest creation: a miniature painting on chewing gum, stuck to the steel structure. The 57-year-old Englishman has toured the British capital for the past 15 years sculpting and repainting scraps of gum discarded by passers-by. But its not just an eccentric hobby. Wilson considers the results a form of art, as well as recycling. "Im transforming the rubbish and making it into a form of art, so thats a form of recycling," he told AFP on a sunny morning on the Millennium Bridge in the shadow of Saint Pauls Cathedral. His colorful creations, barely bigger than a small coin, can be found all along the pedestrian bridge and in the surrounding area. Unless passers-by look closely, they are easy to miss. Many are miniature representations of the famous cathedral nearby, while others are vivid, almost psychedelic drawings, often signed and dated. Originally from north London, Wilson started out carving wood, before turning to chewing gum. Over the years, his unusual hobby has earned him the nickname "chewing gum man". Wilson will spot old gum stuck to steps, streets and other parts of the urban landscape. Then, out comes his equipment: an old paint-stained blanket to sit on, bottles of acrylic paints and varnish, a burner to melt the gum, and, of course, a brush. He is careful to avoid painting on the actual bridge or other surface, in case he is accused of vandalism by the authorities. "The person who spat out the gum is the person that created the criminal damage. Its sad really the impact that humans have on their environment, the amount of rubbish that we create," he noted. He estimates he has painted "thousands and thousands" of pieces of gum, and prides himself on having produced his "hidden art" across central London. Wilson collaborates with galleries and other artists for some income, and refuses any money offered to sign peoples pieces of gum.