No 540 Squadron, Royal Air Force

NO 540 SQUADRON, ROYAL AIR FORCE

History: Formed in October 1942 at Leuchars from the No 1 Photo Reconnaissance Unit.

Official blazon

A mosquito proper.
Motto: Sine qua non = Indispensable.

Origin/meaning

The badge symbolises the Mosquito Aircraft flown by the Squadron. The badge was granted in June 1945.

Literature: Image from https://www.iwm.org.uk/

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