Although listed as cut by the BBFC, the then censor John Trevelyan passed the film uncut according to his memoirs. The 'X' certificate was given due to the subject matter, and occasional tough language, being unsuitable for anyone under the age of 16. Video and DVD releases are now rated PG.
The original release prints had the beginning and ending footage color tinted.
According to director Val Guest, there were two versions of the film. The original version had a topless scene with Janet Munro, and "one for the Americans" in which she has a strategically placed towel around her neck.