When the man running the pub in the village where the film was being shot discovered that he had used up his alcohol ration on the film crew, he was so distraught he committed suicide.
This is the same church that was used in "The Vicar Of Dibley."
The church in the film is the church in the Buckinghamshire village of Turville, and is named St Mary Virgin Church.
The basic premise of this film inspired the 1975 Jack Higgins novel (and later a film) entitled: "The Eagle Has landed."
Basil Sydney, who played Major Ortler, refused to re-record some of his dialogue, saying that he was a member of a religious sect whose members were forbidden to look upon their own image.