Also used to be said of another sqn (70 ??) - the link seemed to be having been present in Singapore when it was overrun by the Japenese.
Whatever the rubric, the core of the story/myth was always "the only RAF Squadron(s) who ever surrendered to the enemy".
I'll try and do a bit of research and see:
a. Which sqns were in Singapore when it surrendered.
b. Where they were based thereafter.