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• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: Collection and Analysis of Middle Eastern and...

  Held by

  The National Archives, Kew

  Date

  1943-1944

  Reference

  HW 68

• Signals concerned with the interception of Middle East and North African communications

  Held by

  The National Archives, Kew

  Date

  1943 Sep 01 - 1943 Oct 31

  Reference

  HW 68/1

• Signals concerned with the interception of Middle East and North African communications

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1944 Feb 29

  Reference

  HW 68/3

• Reports in the series 2501 to VM/2750.

  Held by

  The National Archives

  Date

  1943 Jan 27-1943 Jan 29

  Reference

  HW 20/68

• Decrypts of medium/low grade German naval cypher messages

  Held by

  The National Archives, Kew

  Date

  1942 Jul 10-1942 Aug 20

  Reference

  HW 18/68

• Decrypts of intercepted diplomatic communications. Afghanistan: 19847, 19902, 19922,...

  Held by

  The National Archives, Kew

  Date

  1925 Mar

  Reference

  HW 12/68

• Signals concerned with the interception of Middle East and North African communications

  Held by

  The National Archives, Kew

  Date

  1944 May 01 - 1944 Sep 30

  Reference

  HW 68/5

• GCCS pensioner telegraphists' salaries

  Held by

  The National Archives, Kew

  Date

  1937-1938

  Reference

  HW 3/68

• History and Organisation of Comintern. Extracts from 'The COMINTERN'. GC and CS note...

  Held by

  The National Archives, Kew

  Date

  1944 Nov 1-1967 June 6

  Reference

  HW 17/68

• Signals between sigint liaison units in Ain Beida, Algeria and the Western Desert

  Held by

  The National Archives, Kew

  Date

  1943 Mar 01-1943 Apr 06

  Reference

  HW 41/68

• Italian air activity including daily summaries 355 - 418.

  Held by

  The National Archives, Kew

  Date

  1942 Sept 11-1942 Nov 11

  Reference

  HW 21/68

• Bulgarian State Security and National Militia messages including incidents on border...

  Held by

  The National Archives, Kew

  Date

  1947 Sep 10 - 1947 Sep 23

  Reference

  HW 75/68

• Reports of Japanese army air decrypts with subject headers

  Held by

  The National Archives, Kew

  Date

  1945 Jun 01-1945 Jun 01

  Reference

  HW 28/68

• Operational History of Hut 3 Intelligence Guidance to Cryptography and Interception....

  Held by

  The National Archives, Kew

  Date

  1940 Jan 01 - 1945 May 08

  Reference

  HW 43/68

• 79064-81282

  Held by

  The National Archives, Kew

  Date

  1944 May 05-1944 Jun 09

  Reference

  HW 19/68

• Analyses of GAF day fighter efforts, based on both PEARL and MSS material, commenting...

  Held by

  The National Archives, Kew

  Date

  1944 June 14-1944 Sept 1

  Reference

  HW 13/68

• GPS weekly intelligence highlight reports for BP internal distribution

  Held by

  The National Archives, Kew

  Date

  1942 Sept - 1945 May

  Reference

  HW 16/68

• Siterep east of Kiev, Sept 14: Soviet counter attack beaten off with severe losses;...

  Held by

  The National Archives, Kew

  Date

  1941 Sept 15

  Reference

  HW 1/68

• Organisation of Bletchley Park including preparations for post war move to Eastcote,...

  Held by

  The National Archives, Kew

  Date

  1945 Jun 01 - 1945 Dec 31

  Reference

  HW 64/68