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• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: Staffing, Recruitment and Conditions of Service...

  Held by

  The National Archives, Kew

  Date

  1927-1945

  Reference

  HW 72

• Correspondence with universities on Junior Assistant recruitment for GC&CS

  Held by

  The National Archives, Kew

  Date

  1932 Apr 20 - 1939 Feb 07

  Reference

  HW 72/9

• Staffing matters including recruitment, deployment and conditions of service

  Held by

  The National Archives, Kew

  Date

  1943 Jul 01 - 1943 Dec 31

  Reference

  HW 72/4

• Dossier on Hollerith Machinery. Historical notes on use of Hollerith equipment under...

  Held by

  The National Archives, Kew

  Date

  1935 Jan 01 - 1945 Jul 02

  Reference

  HW 50/72

• Administrative messages passed between Middle East Commands

  Held by

  The National Archives, Kew

  Date

  1943 Apr 05-1943 May 24

  Reference

  HW 41/72

• Decrypts of intercepted diplomatic communications. Afghanistan: 20788-20789, 20817-20818,...

  Held by

  The National Archives, Kew

  Date

  1925 July

  Reference

  HW 12/72

• Correspondence between GC&CS, Foreign Office and the Civil Service Commission concerning...

  Held by

  The National Archives, Kew

  Date

  1927 Oct 29 - 1939 Jul 19

  Reference

  HW 72/1

• Staffing matters including recruitment, deployment and conditions of service

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1944 Jun 30

  Reference

  HW 72/5

• Correspondence with the Foreign Office and the Civil Service Commission on the recruitment...

  Held by

  The National Archives, Kew

  Date

  1932 May 25 - 1938 Feb 21

  Reference

  HW 72/2

• Bletchley Park administrative returns

  Held by

  The National Archives, Kew

  Date

  1945 Oct 01 - 1945 Dec 31

  Reference

  HW 64/72

• Rush Operational Signals to N.I.D. [Naval Intelligence Division, Admiralty] 8E.I....

  Held by

  The National Archives, Kew

  Date

  1944 Jan 20-1944 Jun 29

  Reference

  HW 8/72

• Enemy exploitation of Naval lettered coordinates: miscellaneous reports and correspondence....

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01 - 1945 Dec 31

  Reference

  HW 40/72

• German section: reports of German army and air force high grade machine decrypts

  Held by

  The National Archives, Kew

  Date

  Mar 13 1942-Mar 16 1942

  Reference

  HW 5/72

• Comintern messages: Communist Party of Great Britain, LONDON, and KOMPARTY BERLIN

  Held by

  The National Archives, Kew

  Date

  1932 Nov 5-1933 Feb 1

  Reference

  HW 17/72

• Decrypts of medium/low grade German naval cypher messages

  Held by

  The National Archives, Kew

  Date

  1943 Jan 11-1943 Feb 21

  Reference

  HW 18/72

• Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1944 Dec 16-1944 Dec 21

  Reference

  HW 35/72

• Bulgarian State Security and National Militia miscellaneous messages

  Held by

  The National Archives, Kew

  Date

  1948 Jan 12 - 1949 Jul 15

  Reference

  HW 75/72

• Interception of German strategic communications codenamed Fort

  Held by

  The National Archives, Kew

  Date

  1942 Nov 19 - 1944 Jan 21

  Reference

  HW 51/72

• Staffing matters including recruitment, deployment and conditions of service. Includes...

  Held by

  The National Archives, Kew

  Date

  1945 Jul 01 - 1945 Dec 31

  Reference

  HW 72/8