* FairForItsDay: The "Mr Wu" songs have some dodgy lyrics by modern standards, for example this bit from "Mr Wu's An Air Raid Warden Now":
-->''He goes round every night,\\
To make the black-out sure.\\
So if you've got a chink in your window,\\
You'll have [[IncrediblyLamePun another one]] at your door.''
** At the time, though, nobody else would have made songs that portrayed a Chinese immigrant in a sympathetic light (in the song mentioned above and in a later one which has him become an RAF pilot, he's actually quite the hero). This is especially noteworthy given that the original "Mr Wu" was a YellowPeril villain from a 1913 play who was taken up as a recurring character in music hall; Formby used the name for the recognition, but not much else.
* LGBTFanbase: According to a 1999 biography, ''Bell-Bottom George'' [[note]]the title refers to the bell-bottomed (ie. flared) trousers that were traditionally part of the Royal Navy's uniform [[/note]] was a hit with his "surprisingly large, closeted gay following".
* RetroactiveRecognition: It happens a few times in the films.
** Creator/AlastairSim (of ''[[Film/Scrooge1951 Scrooge]]'' fame) had a supporting role in ''Film/KeepYourSeatsPlease''.
** One of the saboteurs in ''Spare a Copper'' was played by Bernard Lee -- who would go on to be [[Characters/JamesBondM M]] in the Bond films.
** In ''Bell-Bottom George'', the role of "BBC Radio Man" was played by Creator/CharlesHawtrey.
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