In a stunning setback for Labour, the Green party has decisively won the Gorton and Denton byelection, with Reform UK finishing second. Does this result signal the end of Labour’s safe seats? And could it mark the beginning of the end for Keir Starmer? John Harris, Pippa Crerar and Kiran Stacey unpack the fallout – and explore what might happen next. Help support our independent journalism at <a href="https://www.theguardian.com/politicspod">theguardian.com/politicspod</a>