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  General records of the Government Code and Cypher School

  href="HW-d1-c49">HW 49; Papers on writing of the history of British signals intelligence HW 50; Papers relating to comsec editing of Winston Churchill's 'The Second World War'

  Held by
  Date
  1914-1979
  Reference

• Catalogue level

  Piece

  Memorandum by de Grey of 17 August 1949. Includes incomplete copy of covering letter...

  Memorandum by de Grey of 17 August 1949. Includes incomplete copy of covering letter and photograph of Nigel de Grey. An incisive and hard-hitting survey of the over-all organisation of GC&CS and of British Sigint in general during World War II w…

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1949 Aug 17

  Reference

  HW 50/50

• Catalogue level

  Series

  Government Code and Cypher School and Government Communications Headquarters: Records...

  This series contains records produced during the production of the History of British Signals Intelligence in World War II (now preserved in HW 11).

  Held by

  The National Archives, Kew

  Date

  1914-1954

  Reference

  HW 50

• Catalogue level

  Item

  Stockholm; 1. Intelligence via PER from a Swedish airman Stockholm; 2. Naval intelligence...

  Stockholm; 1. Intelligence via PER from a Swedish airman Stockholm; 2. Naval intelligence from VALER.

  Held by

  The National Archives, Kew

  Date

  1942 June 24

  Reference

  HW 15/50/50

• Catalogue level

  Piece

  The interception of German Teleprinter Communications at Foreign Office Station Knockholt....

  The interception of German Teleprinter Communications at Foreign Office Station Knockholt. A description by Kenworthy, who was GC&CS's main technical officer for interception of new radio transmissions, dealing with the interception of German enc…

  Held by

  The National Archives, Kew

  Date

  1926 Jan 01 - 1945 May 31

  Reference

  HW 50/79

• Catalogue level

  Piece

  SYG [Special Y Group] (Chicksands) and WOYG [War Office Y Group] (Beaumanor). Historical...

  SYG [Special Y Group] (Chicksands) and WOYG [War Office Y Group] (Beaumanor). Historical notes and file extracts in support of writing of histories of these intercept stations. SYG was only briefly at Chicksands before moving to Beaumanor to become W…

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1944 Oct 27

  Reference

  HW 50/87

• Catalogue level

  Piece

  Albanian Directorate of Security messages including references to Greek Civil War

  Albanian Directorate of Security messages including references to Greek Civil War

  Held by

  The National Archives, Kew

  Date

  1947 Sep 11 - 1947 Nov 03

  Reference

  HW 75/50

• Catalogue level

  Piece

  BP staff selection and retention; RAF manning, WRNS postings, ATS postings to BP...

  Aug 24, minutes of BP Comms Committee meeting Aug 24, Type X Cypher Training School to be set up in Hut 5 from Sept; new war establishment issued for HQ Military Wing at BP under command of Col JH Tiltman; interview results for next Sigint course at …

  Held by

  The National Archives, Kew

  Date

  1942 Aug 21-31

  Reference

  HW 14/50

• Catalogue level

  Piece

  Air Force Sigint Pre-War Organisation. Notes on RAF intercept stations and their...

  Air Force Sigint Pre-War Organisation. Notes on RAF intercept stations and their establishments 1927-1939

  Held by

  The National Archives, Kew

  Date

  1927 Jan 01 - 1939 Aug 31

  Reference

  HW 50/45

• Catalogue level

  Piece

  SID ETOUSA [Signal Intelligence Division, European Theatre of Operations, US Army]...

  SID ETOUSA [Signal Intelligence Division, European Theatre of Operations, US Army] - Liaison with the British. Part of the process of writing the Sigint history of World War II

  Held by

  The National Archives, Kew

  Date

  1942 Jun 01 - 1945 May 06

  Reference

  HW 50/93

• Catalogue level

  Piece

  (1) Division of Labour. Anderson - GC&CS, (2) Liaison Visits to Anderson, (3) Correlation...

  (1) Division of Labour. Anderson - GC&CS, (2) Liaison Visits to Anderson, (3) Correlation of Strategic Intelligence Research between Anderson? UK? and MIS (Washington). Historical notes and file extracts on the history of what became HMS Anderson…

  Held by

  The National Archives, Kew

  Date

  1941 Dec 18 - 1945 Sep 04

  Reference

  HW 50/89

• Catalogue level

  Piece

  Communications Dossier No 4, 'Y' W/T Network [Sigint wireless telegraphy network]....

  Communications Dossier No 4, 'Y' W/T Network [Sigint wireless telegraphy network]. Notes on the establishment of a communications network to carry Sigint (before World War II intercept material from overseas was sent by shipborne bag)

  Held by

  The National Archives, Kew

  Date

  1937 Dec 10 - 1945 May 12

  Reference

  HW 50/36

• Catalogue level

  Piece

  U-Boat Tracking - Admiralty and United States. Memorandum for Admiral King of 7 September...

  U-Boat Tracking - Admiralty and United States. Memorandum for Admiral King of 7 September 1945. Admiralty U-Boat Tracking Room 1939-1945 with covering letters. F-21 War Report on the U/Boat Tracking Room of the Commander in Chief, United States Fleet…

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 50/94

• Catalogue level

  Piece

  Dossiers - Air Ministry. Notes on the development of the Royal Air Force intelligence...

  Dossiers - Air Ministry. Notes on the development of the Royal Air Force intelligence organisation and on the use of Sigint within the Air Ministry

  Held by

  The National Archives, Kew

  Date

  1939 Feb 01 - 1944 Nov 30

  Reference

  HW 50/25

• Catalogue level

  Piece

  Dossiers on Training Courses - Army, Air Force, Naval Personnel. Extracts from files...

  Dossiers on Training Courses - Army, Air Force, Naval Personnel. Extracts from files on training of service personnel in interception and analysis of German and Japanese wireless telegraphy and radio telephone communications

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 50/34

• Catalogue level

  Piece

  Documentation on MEW [Ministry of Economic Warfare]. Notes on the provision of Sigint...

  Documentation on MEW [Ministry of Economic Warfare]. Notes on the provision of Sigint intelligence to MEW

  Held by

  The National Archives, Kew

  Date

  1944 May 16 - 1944 Nov 27

  Reference

  HW 50/14

• Catalogue level

  Piece

  Matapan Dossier. Notes on the contribution of Sigint to the defeat of the Italian...

  Matapan Dossier. Notes on the contribution of Sigint to the defeat of the Italian Navy at Matapan

  Held by

  The National Archives, Kew

  Date

  1940 Sep 25 - 1945 Oct 31

  Reference

  HW 50/53

• Catalogue level

  Piece

  Dossier on Middle East and North Africa Naval Sigint Organisation. Synopis for a...

  Dossier on Middle East and North Africa Naval Sigint Organisation. Synopis for a History of Naval Sigint in the Mediterranean; Complaints about Alexandria; Dryden Index of some papers. Extracts from files and Frank Birch's papers

  Held by

  The National Archives, Kew

  Date

  1935 Sep 16 - 1945 Jan 31

  Reference

  HW 50/39

• Catalogue level

  Piece

  EF [Eastern Fleet] Unit (Colombo), Autumn 1943 - Summer 1944. Historical notes on...

  EF [Eastern Fleet] Unit (Colombo), Autumn 1943 - Summer 1944. Historical notes on the development of HMS Anderson, the Admiralty Far East intercept and reporting station and on Sigint relations with the United States Navy

  Held by

  The National Archives, Kew

  Date

  1943 Oct 17 - 1944 Dec 30

  Reference

  HW 50/91

• Catalogue level

  Piece

  History of Italian Field Y during the 'CRUSADER' Campaign (1941-1942) with particular...

  History of Italian Field Y during the 'CRUSADER' Campaign (1941-1942) with particular reference to Mobile Section No. 2 SWG [Special Wireless Group] (MOBSEC). Sigint in the field in the Libyan desert

  Held by

  The National Archives, Kew

  Date

  1941 Nov 18 - 1942 Jan 17

  Reference

  HW 50/42