Brian Johnston has said that his interview was completely unscripted apart from the final question, which was integral to the plot.
The race footage is from the 1949 Derby, won by Nimbus.
During filming Michael Wilding met Elizabeth Taylor who was shooting 'Ivanhoe' at MGM British Studios, Borehamwood. They would marry on February 21 1952, with Anna Neagle and Herbert Wilcox as witnesses.
David Scott (Michael Wilding) claims never to have seen Gerald Berkeley's films 'Nightingales in Knightsbridge' or 'A Kiss in Kensington'. They sound very similar to the Wilding/ Neagle romances of the late 1940s such as 'Spring in Park Lane', 'Maytime in Mayfair' etc.