The Bells Go Down is a 1943 black-and-white wartime film made by Ealing Studios. The reference in the title is to the alarm bells in the fire station that "go down" when a call to respond is made. The film is an ensemble piece that covers the period between 27 August 1939 and 9 September 1940, when World War II began and London was subjected to aerial bombing, and is a tribute to the solidarity of not just those engaged in service, but among the British people as a whole.It was produced by Michael Balcon and directed by Basil Dearden and was intended to give praise to the British Auxiliary Fire Service (AFS). Although the plot employs fictitious landmarks and localities, many of the incidental shots were taken at actual fires caused by the air raids on London in the previous two years. A sub-plot depicted the rivalry between the part-time AFS and the full-time London Fire Brigade (the two brigades merged into the National Fire Service in 1941). The reasons for joining the service, the training and finally the work and tragedy during September 1940 Blitz on London were shown for several characters. The background narration was spoken by Leo Genn.The film was released at nearly the same time as the similar Fires Were Started, a fictional "documentary" that used actual firemen instead of professional actors, and as a result was sometimes reviewed unfavorably by comparison.

The score was originally offered to William Walton, but for various reasons (possibly including that he had lost his own home in the Blitz) he offered it to his musical assistant Roy Douglas.