40 Group RAF is a former Royal Air Force Maintenance group that was operational from 1 January 1939, throughout the Second World War and into the Cold War until 28 July 1961 within RAF Maintenance Command that dealt with equipment, barracks stores and motor transport storage.

40 Group Communication Flight was operational until 1 May 1944 with duties taken over by the Maintenance Command Communication Squadron RAF.

42 (Maintenance) Group RAF was formed on 1 January 1939 as an Ammunition and Fuel group, it was disbanded into No.

40 Group RAF on 2 January 1956 while 42 Group was at RAF Kidlington.

[2] November 1939 - HQ at Burghfield Common, Reading[3] May 1941 - HQ at Burghfield Common, Reading[4] April 1942 - Burghfield Common, Reading[5] April 1943 - HQ at Burghfield Common, Reading[6] July 1944 - HQ at Burghfield Common, Reading[7] July 1945 - HQ at Burghfield Common, Reading[8] April 1953 - HQ at RAF Kidlington[9]