and cinematographer Erwin Hillier (who shot the entire film without a light meter). From various topographical references and a map briefly shown in the film, it is clear that the Isle of Kiloran is based on Colonsay. The name Kiloran was borrowed from one of Colonsay's bays, Kiloran Bay. The heroine of the film is trying to get to "Kiloran" (Colonsay), but nobody ever gets there. No footage was shot on Colonsay. One of the most complex scenes shows the small boat battling the Corryvreckan whirlpool. This was a combination of footage shot at Corryvreckan between the Hebridean islands of Scarba and Jura, and Bealach a'Choin Ghlais (Sound of the Grey Dogs) between Scarba and Lunga. There are some long-distance shots looking down over the area, shot from one of the islands. There are some middle-distance and close-up shots that were made from a small boat with a hand-held camera. There were some model shots, done in the tank at the studio. These had gelatin added to the water so that it would hold its shape better and would look better when scaled up. The close-up shots of the people in the boat were all done in the studio, with a boat on gimbals being rocked in all directions by some hefty studio hands while others threw buckets of water at them. These were filmed with the shots made from the boat with the hand-held camera projected behind them. Further trickery joined some of the long- and middle-distance shots together with those made in the tank into a single frame. Though much of the film was shot in the Hebrides, Livesey was not able to travel to Scotland because he was performing in a West End play, The Banbury Nose by Peter Ustinov, at the time of filming. Thus all his scenes were shot in the studio at Denham, and a double (coached by Livesey in London) was used in all of his scenes shot in Scotland. These were then mixed so that the same scene would often have a middle-distance shot of the double and then a closeup of Livesey, or a shot of the double's back followed by a shot showing Livesey's face. The film was budgeted at £200,000 () and went £30,000 over. The actors received £50,000, of which one third went to Hiller. The whirlpool cost £40,000. Powell shot a scene at the end of the