The squadron was first formed as No. 12 Squadron RNAS as a training unit within No 1 Wing of the Royal Naval Air Service at Hondschoote on 8 June 1917. Unlike other RNAS squadrons, it was not redesignated to an RAF 200-series squadron number on the day the RAF was established (1 April 1918) as the squadron was disbanded.
Halley, James J. The Squadrons of the Royal Air Force. Tonbridge, Kent, UK: Air Britain (Historians) Ltd., 1980. ISBN 0-85130-083-9.
Jefford, C.G., Wing Commander MBE, BA, RAF (Retd). RAF Squadrons, a Comprehensive Record of the Movement and Equipment of all RAF Squadrons and their Antecedents since 1912. Shrewsbury, UK: Airlife Publishing Ltd., 1998 (second edition 2001). ISBN 1-84037-141-2.