The futuristic new supersonic airliner that they are trying to sell to TransGlobal Airlines is actually not even a passenger-carrying plane. The aircraft shown throughout the movie is a Handley Page Victor, a subsonic Strategic Nuclear Bomber, one of Britain's famous V-Bombers used by the R.A.F. throughout the Cold War years.
The Iron Maiden traction engine (a John Fowler & Co. 7 showman's engine, reg FX 6661) was used as a prop in "Sing and Swing (1963)," with Gene Vincent appearing to clean it as he sings "Temptation Baby" to the young woman in the cab.
The Woburn Abbey and grounds seen in the traction engine rally toward the end of the film have been the seat of the Dukes of Bedford since 1547. That year, Henry VIII gave the Woburn Abbey to John Russell, the 1st Earl of Bedford. Henry had confiscated the abbey from the Catholic Church in the 1530s. It had been a Cistercian monastery since 1145. The Dukes first demolished the old buildings. The abbey structures date to 1744, with a number of changes and renovations since then, due mostly to deterioration. The estate in 2020 includes a large drive-through wild animal park, and remains in the Russell family.
This is the second theatrical movie of Sir John Standing (Humphrey Gore-Brown). His first was "A Pair of Briefs" (1962).
The fairground where Jack (Michael Craig) stops to look at the Duchess of Avon traction engine, and Kathy (Anne Helm) gets stuck on the big wheel, was part of the grounds of Producer Peter Rogers' house.