According to one writer it was with this film that "Guillermin’s talent for clear, compact, efficient direction became evident: his tautly-shot thriller remains the strongest crime drama in the Adelphi catalogue.

"[6] Dermot Walsh says that during filming an electrician fell twenty feet from railing down to the floor "but Guillermin wouldn't hold up production, he just went on shooting.

[8] The film was rejected for distribution by the main British cinema circuits but Guillermin found the movie useful in launching his career.

[9] The Monthly Film Bulletin wrote: "Cliché-ridden script, overplayed characters, but a feeling once or twice that the director had some elusive Higher Thing in mind.

"[10] Kine Weekly wrote: "The picture contains rather a lot of talk during the early stages, but above-average acting and photography enable it to transcend initial shortcomings and gallop to a gripping climax.