Authenticity is rare in politics. Andy Burnham, soon to be the UK’s new prime minister, who reminds us frequently he is dead northern, would like us to believe he’s a nice guy who has just happened to get to the top of politics through hard work, integrity and sorting out Manchester’s buses. But his tedious schtick as a sub-David Brent centrist dad from t’north, dancing awkwardly to New Order, dissolved within moments of the first real scrutiny he has received since being re-elected as an MP. On Friday, the newly-crowned Labour leader could barely keep a straight face when denying...