Andy Burnham has gone from metro mayor to prime minister-in-waiting. When did he decide to make the move against Starmer, and how’s he done it? Chris Mason and Faisal Islam are in Sheffield for the Crossed Wires podcast festival for a special episode in which they track the journey from London to Manchester and back again. Subscribe to our channel here: https://bbc.in/bbcnews For the latest news download the BBC News app or visit BBC.com/news #BBCNews