Postman's Knock 1962

Synopsis:

Likeable country postman Harold Petts gets transferred from his village to London, where on his arrival he unwittingly foils a mail train robbery. Innocent in the ways of the big city, he is thought to be a member of another gang by both the train robbers and the police, who all suspect him of trying to rob the post office where he works.

Directed by: Robert Lynn
Written by: John Briley & Jack Trevor Story
Cast:
Spike Milligan
Spike Milligan
Harold Petts 
John Wood
John Wood
P.C. Woods 
Warren Mitchell
Warren Mitchell
Rupert 
Archie Duncan
Archie Duncan
Inspector