It was a moment that had all the hallmarks of Andy Burnham ’s sense of humour. Last October, I was interviewing the then Mayor of Greater Manchester , on a stage in London’s West End. Ostensibly, the interview was about ‘Head North’ - his joint book with Steve Rotheram, Mayor of the Liverpool City Region, on how to rewire the country. But speculation had once again reached fever-pitch that morning that Burnham was about to make a move for the Labour ’s leadership. We were there to talk about