The gold carpet at the premiere of Misbehaviour — Philippa Lowthorpe’s film about the 1970 Miss World beauty competition, the first to crown a black woman the winner — was awash with famous faces, from Keira Knightley to The Crown’s Diana-to-be, Emma Corrin. The stand-out moment, however, was star of the film, Gugu Mbatha-Raw, delightedly hugging her real-life counterpart, Jennifer Hosten.