Keira Knightley weeps as she hears the wartime love story of her sonar operator grandfather and brave volunteer grandmother.
The Hollywood star is also moved to tears when she learns her great uncle Andrew, an RAF bombardier, was shot down over Germany and spent 18 months as a prisoner of war.
The revelations, in Channel 4 documentary My Grandparents’ War, come as the actress recalls that tough grandma Jan, from Glasgow, never spoke about her experience.
