Grand National Night

Grand National Night is a 1953 British thriller brought to the screen by George Minter under the production of Phil C. Samuel from a play by Campbell and Dorothy Christie. It was directed by Bob McNaught and starred Nigel Patrick, Moira Lister and Beatrice Campbell Patricks wife with support from Michael Hordern, Noel Purcell and a cameo role from Colin Gordon. Cinematography was by Jack Asher. Previous to this film version Grand National Night had been presented as a BBC Radio serial as well as a stage play.

Source: Wikipedia