This was the play by Joan Temple that, like Agatha Christie's The Mousetrap, was inspired by the death of Dennis O'Neill, a 12-year-old foster child, in 1945.
After No Room at the Inn had cleaned up in the West End, it went on a national tour, though without its star, the awe-inspiring Freda Jackson.
As there were so many children in the cast, the company needed a tutor for them to make up for the schooling they were missing.
That role was taken by a young man keen on a career in the theatre - he even fancied writing plays. And he used it as a route to becoming an assistant stage manager and then a member of the cast.
His name? John Osborne. He was the archetypal Angry Young Man of the Fifties and the author of the epoch-making play Look Back in Anger.