In my latest podcast, Paul Stone, aka My Dog Sighs, tells the extraordinary story of how a chance encounter with a stencilled rat unlocked a creative urge to make street art, how giving away art made from found items mushroomed into a worldwide phenomenon he named Free Art Friday, how this bolstered his reputation leading to exhibitions and commissions, and about his latest immersive installation in a four-storey derelict building in his hometown of Portsmouth.