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• Accessions administration: HW 38

  Held by

  The National Archives, Kew

  Date

  2000 Jan 1 - 2000 Dec 31

  Reference

  PRO 57/15769

• Appendix 4A Paris - see HW 15/38 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/9

• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: Diplomatic Section: Reports to British Agencies...

  Held by

  The National Archives, Kew

  Date

  1943

  Reference

  HW 38

• GC&CS Naval Cryptanalytic Studies Volume XIII: The Japanese Merchant/Navy Liaison...

  Held by

  Creating government department or its successor

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/38

• DSH 15 - Cryptographic Reports. Technical crypt reports. The section was at Elmers...

  Held by

  The National Archives, Kew

  Date

  1940 Jan 01 - 1943 Apr 02

  Reference

  HW 53/38

• Synopsis on 'Y' [Sigint] at Sea (European Naval). Notes on the establishment of sea-going...

  Held by

  The National Archives, Kew

  Date

  1941 Apr 04 - 1942 Jul 22

  Reference

  HW 50/38

• Reports and correspondence relating to enemy exploitation of communications associated...

  Held by

  The National Archives, Kew

  Date

  1944 Dec 05 - 1945 Mar 27

  Reference

  HW 40/38

• Romanian Police reports on political, security and economic matters including worker...

  Held by

  The National Archives, Kew

  Date

  1947 Jan 13 - 1947 Feb 07

  Reference

  HW 75/38

• Decrypts of intercepted diplomatic communications. Afghanistan: 10963. France: 10953-10954,...

  Held by

  The National Archives, Kew

  Date

  1922 Sept

  Reference

  HW 12/38

• ALAN TURING WARTIME RESEARCH PAPERS RELEASED BY GCHQ'Paper on Statistics of Repetitions'...

  Held by

  The National Archives, Kew

  Date

  1945 Jan 01 - 1946 Dec 31

  Reference

  HW 25/38

• Information on the communications of the German, Spanish, Italian and French navies

  Held by

  The National Archives, Kew

  Date

  1942 Jul 15-1944 Apr 16

  Reference

  HW 18/38

• Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1944 May 16-1944 May 22

  Reference

  HW 35/38

• Outgoing reports policy

  Held by

  The National Archives, Kew

  Date

  1941 Dec 12-1945 Apr 12

  Reference

  HW 2/38

• Reports of Japanese army air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 Jan 08-1945 Jul 18

  Reference

  HW 28/38

• Reports of Japanese naval air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 May 07-1945 Jun 30

  Reference

  HW 27/38

• Weekly summary reports on Second World War German army and air force communications

  Held by

  The National Archives, Kew

  Date

  1944 Aug 12-1944 Sep 02

  Reference

  HW 45/38

• 38732-40440

  Held by

  The National Archives, Kew

  Date

  1942 Sep 16-1942 Sep 30

  Reference

  HW 19/38

• German Naval Air Activity (GNA): Including reconnaissance and offensive operations

  Held by

  The National Archives, Kew

  Date

  1944 Jan 1-1944 Mar 31

  Reference

  HW 13/38

• GAF strength in northern Norway on Aug 24. Italian minister, Lisbon reports meeting...

  Held by

  The National Archives, Kew

  Date

  1941 Sept 1

  Reference

  HW 1/38