Despite its London setting, this was Independently produced and filmed in the Republic of Ireland. The version shown by Talking Pictures TV in the UK in 2024 appears to derive from a 16mm film print. Whilst not definite, this is often indicative that the original negative has been lost or that there are no usable 35mm film prints in circulation for use by a broadcaster.
This film features the only acting performance by Jimmy Sangster, famous as a writer of Hammer horror films (and involved in writing this, too). Sangster, uncredited, plays Winston Churchill, who, in turn, is referred to only as "the Home Secretary", which was Churchill's government job at the time......Churchill is mentioned by name; a child in the onlooking crowd asks his mother who the man joining the police officers is, and she says the Home Secretary. The boy then asks what the man's name is and the mother thinks about it for a moment, then tells him that the man's name is Winston Churchill.
Alan Simpson, a well known writer of such TV shows as Steptoe & Son, Sanford & Son, and who wrote for Tony Hancock, Frankie Howerd and Sid James and probably best known for his writing partnership with Ray Galton plays a police inspector in this movie. One of a very few acting performances by him on film or TV.