Downton Abbey’s Mr Carson may have hung up his butler’s jacket for good, but even as his final scenes were being shot, actor Jim Carter was already at work on a remarkable and long-cherished film about the King of Skiffle, 1950s singer Lonnie Donegan. In Jim Carter: Lonnie Donegan and Me, the actor shares his life-long passion, which began aged 11 when he saw Lonnie play at a seaside variety theatre on a summer holiday, as he tells the story of his profound impact on pop culture and a generation of British musicians who went on to conquer the world.