A couple on a motorbike “cut up” a royal Rolls-Royce as it waits at traffic lights on St George’s Drive at the junction with Warwick Square. But there aren’t any traffic lights there? Not really, but there were when filming for the latest series of The Crown, Netflix’s acclaimed series on the life of the Queen, took place on May bank holiday weekend. The bike’s passenger is “fun-loving” Princess Margaret, perched behind her then boyfriend Anthony Armstrong-Jones. Well, the actors playing them anyway.