For the period April to September 1939, "No. 629 (Chiltern) Squadron" of the Auxiliary Air Force was allocated the Squadron Code LQ for use by the squadron, were it to be formed, but this did not happen.
^No 605 - 610 Squadron Histories, Air of Authority Archived 2 September 2009 at the Wayback Machine
^RAFWeb's Air of Authority on page Nos. 621 - 650 Squadron Histories
Halley, James J. The Squadrons of the Royal Air Force & Commonwealth, 1918-1988. Tonbridge, Kent, UK: Air Britain (Historians) Ltd., 1988. ISBN 0-85130-164-9.
Jefford, C.G. RAF Squadrons, a Comprehensive Record of the Movement and Equipment of all RAF Squadrons and their Antecedents since 1912. Shrewsbury, Shropshire, UK: Airlife Publishing, 2001. ISBN 1-84037-141-2.
Squadron histories and more for nos. 621-650 squadron on rafweb