- The apparently haphazard switching between black and white and color footage in the film is not for any particular artistic reason on Lindsay Anderson's part, but for monetary reasons. Anderson shot the film out of sequence, and by the time he reached the end of shooting, he had gone over budget. To save money, the rest of the scenes were shot with cheaper black and white stock.
- The film was shot at director Lindsay Anderson's actual old school in Cheltenham, England.
- Although the film was shot at Cheltenham College, the script "Crusaders" was based on the authors' old school Tonbridge School. Tonbridge was the original choice for the outdoor shots, but the school declined believing it would bring bad publicity. All-boys boarding schools were receiving quite unfavourable press at the time, which might explain Tonbridge's decision.
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