Taking a cue from The King’s Speech, A Royal Night Out fashions diverting entertainment from a footnote from royal history – the moment on VE Day, 1945, when teenage princesses Elizabeth and Margaret briefly slipped the shackles of royal protocol to join the throngs of Londoners celebrating the end of the war.

Inventing some mildly risqué adventures for the pair, Julian Jarrold’s film is not as polished or as witty as its predecessor, and doesn’t tug the heartstrings nearly as hard, but it remains a breezy, amiable romp with bags of charm. Sarah Gadon is a sweet-tempered, dutiful Elizabeth and Bel Powley a more broadly comic Margaret, very much the dim, pleasure-seeking flibbertigibbet, while Jack Reynor is the staunchly republican airman who unwittingly becomes Elizabeth’s companion and protector for the night.

Certificate 12. Runtime 97 mins. Director Julian Jarrold

A Royal Night Out is available on Blu-ray, DVD and On Demand from 7th September, and EST from 4th September, courtesy of Lionsgate Home Entertainment