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  Piece

  Papers on various staff matters including transport, washing facilities, accommodation...

  Papers on various staff matters including transport, washing facilities, accommodation and air raid precautions (ARP)

  Held by

  The National Archives, Kew

  Date

  1943 Jan 26 - 1944 Mar 02

  Reference

  HW 72/10

• Catalogue level

  Piece

  Liaison with Indian signal intelligence authorities and intercept stations

  Liaison with Indian signal intelligence authorities and intercept stations

  Held by

  The National Archives, Kew

  Date

  1942 Apr 01 - 1943 Oct 27

  Reference

  HW 61/10

• Catalogue level

  Piece

  Security of electronic communications

  Security of electronic communications

  Held by

  Creating government department or its successor

  Date

  1956 Jan-1961 June

  Reference

  HW 9/10

• Catalogue level

  Piece

  Japanese and Siamese (Thai) diplomatic and attaché telegrams

  Japanese and Siamese (Thai) diplomatic and attaché telegrams

  Held by

  The National Archives, Kew

  Date

  1945 May 19-July 7

  Reference

  HW 10/3

• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Jan 25-1940 Jan 31

  Reference

  HW 29/10

• Catalogue level

  Piece

  Government Code and Cypher School: Far East diplomatic summaries

  Government Code and Cypher School: Far East diplomatic summaries

  Held by

  The National Archives, Kew

  Date

  1945 Apr 6-Nov 19

  Reference

  HW 10/1

• Catalogue level

  Piece

  French Liaison. Notes on Anglo-French cooperation up to the fall of France (ENIGMA...

  French Liaison. Notes on Anglo-French cooperation up to the fall of France (ENIGMA and the Poles, British Mission Richard, French naval officers at Bletchley Park); continued contacts with Bertrand located in Vichy France; liaison with the French in …

  Held by

  The National Archives, Kew

  Date

  1938 Sep 09 - 1945 May 02

  Reference

  HW 50/10

• Catalogue level

  Piece

  Correspondence with USA on Japanese meteorological cyphers

  Correspondence with USA on Japanese meteorological cyphers

  Held by

  The National Archives, Kew

  Date

  1944 Jan 08 - 1944 Aug 08

  Reference

  HW 54/10

• Catalogue level

  Piece

  Y Board 1943 Subjects discussed include: liaison with Russians memorandum on the...

  Y Board 1943Subjects discussed include: liaison with Russians memorandum on the working of the Y Board and Y Committee organisation memorandum on the dissemination of Signal Intelligence within the British and American Forces the expansion of the Y S…

  Held by

  The National Archives, Kew

  Date

  1943 Jan 07-1943 Oct 19

  Reference

  HW 42/10

• Catalogue level

  Piece

  Reports in the series MK/2501 to MK/3000.

  Reports in the series MK/2501 to MK/3000.

  Held by

  The National Archives

  Date

  1942 Feb 11-1942 Feb 28

  Reference

  HW 20/10

• Catalogue level

  Piece

  ENIGMA machine - early history (written after the event). H R FOSS: Reminiscences...

  ENIGMA machine - early history (written after the event). H R FOSS: Reminiscences on the ENIGMA machine. N de GREY: ENIGMA history

  Held by

  The National Archives, Kew

  Date

  1949 Sep 30-1949 Oct 31

  Reference

  HW 25/10

• Catalogue level

  Piece

  Reports of decrypts of Japanese military attachés messages

  Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1943 Jul 24-1943 Aug 23

  Reference

  HW 35/10

• Catalogue level

  Piece

  Intelligence reports on foreign air forces. (Described at item level)

  Intelligence reports on foreign air forces. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1938 Mar 15-1938 Apr 13

  Reference

  HW 21/10

• Catalogue level

  Piece

  Reports of Japanese naval air decrypts

  Reports of Japanese naval air decrypts

  Held by

  The National Archives, Kew

  Date

  1944 Mar 22-1944 Aug 21

  Reference

  HW 27/10

• Catalogue level

  Piece

  Censors. Correspondence concerning acquisition of telegraphic messages through the...

  Censors. Correspondence concerning acquisition of telegraphic messages through the Telegraph Censorship Branch and action concerning the passage of Axis telegrams

  Held by

  The National Archives, Kew

  Date

  1942 Mar 19 - 1943 Dec 13

  Reference

  HW 53/10

• Catalogue level

  Piece

  Exploitation of US Army cyphers by the Germans

  Exploitation of US Army cyphers by the Germans

  Held by

  The National Archives, Kew

  Date

  1943 Oct 16 - 1945 Mar 17

  Reference

  HW 40/10

• Catalogue level

  Piece

  Monthly wireless activity reports.

  Monthly wireless activity reports.

  Held by

  The National Archives, Kew

  Date

  1935 Jul 01-1935 Dec 31

  Reference

  HW 2/10

• Catalogue level

  Piece

  STARK 252-281

  STARK 252-281

  Held by

  The National Archives, Kew

  Date

  1945 Mar 01-1945 Mar 31

  Reference

  HW 39/10

• Catalogue level

  Piece

  Polish affairs

  Polish affairs

  Held by

  The National Archives, Kew

  Date

  1944 Nov 26-1945 Sep 13

  Reference

  HW 34/10

• Catalogue level

  Piece

  MGB (Soviet Ministry of State Security) Traffic: Moscow with Mexico City, Mexico....

  MGB (Soviet Ministry of State Security) Traffic: Moscow with Mexico City, Mexico. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1944 Jan 15-1945 June 13

  Reference

  HW 15/10