4 Group RAF Pool, which comprised No 7 and No 76 Squadron, within No.
6 Group RAF, to train night bomber crews, for which it was equipped with Handley Page Hampdens and Herefords.
92 Group RAF (92 Gp), 16 OTU converted to Vickers Wellington bombers in April 1942 and from March to December 1942 its headquarters moved to RAF Barford St John whilst runways were laid at Upper Heyford, disbanding on 1 January 1945.
16 Operational Training Unit RAF, remaining at Upper Heyford until 1 March 1946 when it moved to RAF Cottesmore, where it finally disbanded on 15 March 1947, its aircraft and personnel being used to create No.
204 Advanced Flying School RAF (204 AFS).