The Battledore is a training ship for teenage boys with criminal tendencies, who are supposedly being set on the straight and narrow path – when, in fact, one of the members of the crew is training them for careers in housebreaking. Shortly after joining the board of management of the Trust, Miss Marple witnesses the sudden death of a fellow trustee, who has just returned from a surprise visit to the ship, much disturbed by something he has discovered there. He dies without being able to reveal his discovery and Miss Marple resolves to learn what he discovered – even if it means going aboard the Battledore herself. Also stars Nicholas Parsons, Derek Nimmo and Charles Tingwell. This film is not based on an Agatha Christie novel, although it does contain elements of  They Do It With Mirrors. https://cosmiccauldronbooks.com.au/p/mirrors-agatha-christie/

https://cosmiccauldronbooks.com.au/p/margaret-rutherford-dreadnought-good-manners-andrew-merriman/