RAF No 57 Operational Training Unit

Formed at Hawarden from No 7 OTU on 1 November 1940 within No 10 Group to train fighter pilots for Fighter Command using Spitfires and Masters. It was transferred to No 81 Group on 31 December 1940 and from 10 November 1942 operated from Eshott before passing to the control of No 9 Group on 20 April 1943. A further transfer of control to No 12 Group occurred on 15 September 1944 and it finally disbanded on 6 June 1945.

Codes used: - JZ Dec 1940 - Jun 1945; LV Dec 1940 - Jun 1945; PW xxx xxxx - Jun 1945; XO Dec 1940 - Jun 1945