They say you should look up when walking around London, but do so and you might miss Ben Wilson’s unique artistic endeavor – painting miniature scenes on discarded chewing gum. Today (to 8 May), Wilson’s work moves from the pavement to Julian Hartnoll Gallery. As well as canvases on show, there’s a gum trail displaying the work in its natural habitat. Wilson will also transform other litter into art next Saturday. We suspect this could be a trend worth trashing in on.