Glastonbury festival has a rich political history, from its roots in the Campaign for Nuclear Disarmament to links to the climate crisis today. The Guardian’s John Harris was at Glastonbury to find out what is keeping political activism moving on the left and how far Labour has to go. He spoke to the shadow secretary for climate change and net zero, Ed Miliband, the mayor of Greater Manchester, Andy Burnham, and the Labour MP Zarah Sultana. Help support our independent journalism at theguardian.com/politicspod