Air Ministry: Headquarters No. 90 (Signals) Group, later Signals Command: Reports...

Reports and papers relating to the navigational, telecommunications, and electronic warfare functions of the group, including records of the Inspectorate of Radio Services and of Central Signals Establishment, Watton.

Many pieces contain diagrams and photographs.

See also the Defence Signals Staff registered files in DEFE 26

• Air Ministry, Headquarters No 90 (Signals) Group, 1946-1958
• Air Ministry, Signals Command, 1958-1964
• Ministry of Defence, Signals Command, 1964-1969

From 1977 Ministry of Defence

Number 90 Signals Group was formed on 26 April 1946, with Headquarters at Medmenham, Buckinghamshire. It inherited the signals, radio and countermeasures functions of the wartime Numbers 26, 60 and 100 Groups and Number 80 Wing. Its responsibilities therefore covered ground radio engineering - its largest task, for it provided these services for the whole of the Royal Air Force, at home and overseas; telecommunications; electronic warfare; and the calibration and operation of navigational aids.

The Group was raised to Command status on 3 November 1958, in recognition of the invaluable work it had done over the previous decade, becoming Signals Command. When subsequently the UK - based RAF Commands were integrated it became part of Strike Command, as Number 90 (Signals) Group, on 1 January 1969.