Whether he is pulling a pint, tossing a builder’s helmet in the air or running with Olympic medallist Mo Farah, the UK’s new Prime Minister Andy Burnham has embraced social media with a deft touch.As well as putting out videos on his own accounts on X and TikTok, he has sought to broaden his audience by appearing on entertainment channels run by creators with large followings.Compared with predecessor Keir Starmer, “Burnham has a far more astute communications team around him” with a “better...