Frank Launder Director, Screenwriter Alastair Sim Millicent Fritton, Clarence Fritton Actor George Cole Flash Harry Actor Joyce Grenfell P.W. Sgt. Ruby Gates Actor Hermione Baddeley Miss Drownder Actor Betty Ann Davies Miss Waters Actor Beryl Reid Miss Wilson Actor Renee Houston Miss Brimmer Actor Sidney Gilliat Screenwriter Val Valentine Screenwriter Malcolm Arnold Original Music Stanley Pavey Cinematographer Thelma Connell Film Editing