It was based at RAF Medmenham near Marlow, Buckinghamshire.

90 (Signals) Group RAF was formed at Danesfield Court, Medmenham, Marlow, taking over the functions of No 26, 60 (the home air defence radar stations, originally Chain Home and Chain Home Low) and 100 Groups (airborne electronic warfare) and No.

[3] Three De Havilland Comet 2s were modified for RAF use in radar and electronic systems development, initially assigned to No.

51 Squadrons, the 2R series was equipped to monitor Warsaw Pact signal traffic and operated in this role from 1958.

[5] The 2R ELINT series was operational until 1974, when replaced by the Nimrod R1, the last Comet derivative in RAF service.