No. 456 Squadron RAAF used the Defiant between its formation in June 1941 and November 1941 when it converted to Beaufighters. Squadron code letters 'PZ'.[1]
No. 409 (Nighthawk) Squadron used the Defiant on night fighter operations between July 1941 and October 1941,[3] using the squadron code letters 'KP'.[4]
No. 410 (Cougar) Squadron used the Defiant as a nightfighter between June 1941 and June 1942, using the squadron code letters 'RA'.[5]
No. 307 Polish Night Fighter Squadron "Lwowskich Puchaczy" used the Defiant between September 1940 and August 1941,[6] using the squadron code letters 'EW'. 307 was a new nightfighter Defiant squadron formed but did not become operational until December defending western Britain. One of their aircraft was serial number N1671, EW-D, and is the sole complete surviving Defiant which is on display at the RAF Museum at Hendon.
Ansell, Mark. Boulton Paul Defiant. Sandomierz, Poland/Redbourn, Herts: Mushroom Model Publications, 2005. ISBN83-89450-19-4.
Hall, Alan W. and Thomas, Andrew. Boulton Paul Defiant, (Warpaint Series No.42). Luton, Bedfordshire: Warpaint Books Ltd., 2003. OCLC64949042.
Halley, James J. The Squadrons of the Royal Air Force & Commonwealth, 1918–1988. Tonbridge, Kent: Air Britain (Historians) Ltd., 1988. ISBN0-85130-164-9.
Thetford, Owen (1991). British Naval Aircraft since 1912. London, UK: Putnam Aeronautical Books, an imprint of Conway Maritime Press Ltd. ISBN0-85177-849-6.