Leadership Rush: First Candidates to Replace Johnson

Scottish Labour MSP Mercedes Villalba says an election must be called after Boris Johnson's resignation. Conservative MP Alec Shelbrooke tells Bloomberg's Caroline Hepker and Stephen Carroll why he's backing Liz Truss in the Tory leadership race. Yuan Potts has the latest from Westminster, and Matthew Shaddick of Smarkets tells us the unusually wide field of candidates for Tory leader has helped to boost interest in the betting markets.  See omnystudio.com/listener for privacy information.