For many spectators, the most missed presence at the coronation of King Charles III next month will not be that of Meghan, duchess of Sussex, but the late Diana, princess of Wales. In inevitably dreary propinquity to Charles will be the woman soon to be known as the former queen consort and Britain’s newest crowned queen, Camilla — a woman who plays the long game, and is now accepted by most Britons if not universally loved.