The flying sequences under the direction of Anthony Squire, were based at the Vickers aerodrome at Chilbolton near Nether Wallop in Hampshire. Squire managed to secure one of the last airworthy Avro Lancaster bombers for the task. The cameramen were positioned in the front and rear turrets while Squire conducted proceedings from the central astrodome. The Lancaster was replaced by a Vickers Valetta after all, but Squire had fallen asleep due to an oxygen supply failure. Luckily as he recalled, "They all woke up on the way down, like people in a fairy wood, but I didn't bother with the Lancaster again."
When Tony and Susan return from Cairo, it can clearly be seen that the Comet that they fly in has rectangular windows. Extensive redesign after crashes in 1954 - due to metal fatigue - included the windows being changed to an oval shape.
The Vickers-Supermarine Swift, called the "Prometheus" in this movie, is not capable of supersonic flight.
A little over a year after this movie premiered, on Saturday, July 25, 1953, one of the de Havilland Comets shown, G-ALYR, was damaged beyond repair in a taxiing accident without casualties at Calcutta airport.
Despite this fictionalized story of breaking the sound barrier, this feat was accomplished by U.S. Air Force General Chuck Yeager on October 14, 1947 at Edwards Air Force Base. Furthermore, Yeager explained that if a pilot were to break the sound barrier in the manner depicted in this movie, the pilot would've been killed. This movie was also heavily based on the endeavors of the de Havilland company in the U.K. Geoffrey de Havilland, Jr., son of company owner Geoffrey de Havilland, was killed in September 1946 while conducting high speed tests approaching the speed of sound over the Thames estuary.
In this movie, Nigel Patrick and Ann Todd were sitting in a more dangerous plane than they knew. The de Havilland Comet airliner depicted in this movie would become a notorious design for two tragic mid-air break-ups in 1954, which killed all on-board. The aircraft was redesigned, but the legacy would prevent it from being a success.
With this movie, Sir Ralph Richardson became the first actor to win the New York Film Critics Award for Best Actor, who didn't also go on to win an Oscar nomination.
The BAFTA awards associated with this movie were made at a ceremony prior to a showing of "The Titfield Thunderbolt" at the Leicester Square Theatre on March 5, 1953. Mr. Michael Redgrave presented the awards.
The role of Tony Gaithwaite was offered to several name actors, but they rejected as being too small.
Ralph Richardson and Ann Todd were cast as father and daughter, despite the fact that in reality there was little more than four years between them.
About the Comet. If you watch as the lady crosses the hanger floor, there is a Comet in the background, not painted, but in parts. The company flying the Prometheus did not make the Comet.