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• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Nov 21-1943 Nov 23

  Reference

  HW 23/49

• Catalogue level

  Piece

  Battle Front West: German units and locations

  Battle Front West: German units and locations

  Held by

  The National Archives, Kew

  Date

  1944 Nov 25-1945 Apr 20

  Reference

  HW 13/49

• Catalogue level

  Piece

  Naval Headlines: convoy westbound spotted by aircraft and group of eight U-boats...

  Naval Headlines: convoy westbound spotted by aircraft and group of eight U-boats directed to intercept. Italian minister, Kabul reports Afghan government's attitude to possible British demands about the expulsion of German and Italian residents. PM t…

  Held by

  The National Archives, Kew

  Date

  1941 Sept 5

  Reference

  HW 1/49

• Catalogue level

  Piece

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

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

  Held by

  The National Archives, Kew

  Date

  1945 Apr 20-1945 May 06

  Reference

  HW 45/49

• Catalogue level

  Piece

  Stationery

  Stationery

  Held by

  The National Archives, Kew

  Date

  1939 Sep 17

  Reference

  HW 64/49

• Catalogue level

  Piece

  Outline history of Special Liaison Units (SLU)

  Outline history of Special Liaison Units (SLU)

  Held by

  The National Archives, Kew

  Date

  1941 Jul 01 - 1945 May 21

  Reference

  HW 49/5

• Catalogue level

  Piece

  Security of electronic communications

  Security of electronic communications

  Held by

  Creating government department or its successor

  Date

  1954 Mar-1955 June

  Reference

  HW 9/49

• Catalogue level

  Piece

  GC&CS Army and Air Force Sigint Volume VI: The Organisation and Evolution of British...

  GC&CS Army and Air Force Sigint Volume VI: The Organisation and Evolution of British Air Force Sigint III by Lt Cmdr L A Griffiths RNVR

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/49

• Catalogue level

  Piece

  Foreign Office case to Treasury for increasing status and pay of GCCS staff

  Foreign Office case to Treasury for increasing status and pay of GCCS staff

  Held by

  The National Archives, Kew

  Date

  1924

  Reference

  HW 3/49

• Catalogue level

  Piece

  Liaison between Berkeley Street and Washington. Much of the correspondence is concerned...

  Much of the correspondence is concerned with the 'Reserved Series' of reports, which were not released to the USA (see also HW 37)

  Held by

  The National Archives, Kew

  Date

  1943 Nov 17 - 1944 Sep 28

  Reference

  HW 53/49

• Catalogue level

  Piece

  Enemy exploitation of British Army WTI (wireless telegraphy intelligence): miscellaneous...

  Enemy exploitation of British Army WTI (wireless telegraphy intelligence): miscellaneous reports and correspondence

  Held by

  The National Archives, Kew

  Date

  1942 May 30 - 1944 Jan 31

  Reference

  HW 40/49

• Catalogue level

  Piece

  History of Liaison with OP-20-G (Washington) as carried out by Representatives of...

  History of Liaison with OP-20-G (Washington) as carried out by Representatives of Naval Section, G.C. & C.S. An account of the liaison work carried out by Foss, Bodsworth and others at Op-20-G, the U.S. Navy sigint headquarters in Washington. Als…

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01-1946 Mar 26

  Reference

  HW 8/49

• Catalogue level

  Piece

  Reports in the series QT/7751 to QT/8000.

  Reports in the series QT/7751 to QT/8000.

  Held by

  The National Archives

  Date

  1942 Dec 04-1942 Dec 07

  Reference

  HW 20/49

• 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

  1944 Jul 24-1944 Jul 28

  Reference

  HW 35/49

• 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

  1943 Mar 1

  Reference

  HW 21/49

• Catalogue level

  Piece

  Decrypts of intercepted diplomatic communications. Abyssinia: 13929. Afghanistan:...

  Decrypts of intercepted diplomatic communications. Abyssinia: 13929. Afghanistan: 13898-13899, 13952-13953, 13979, 13984, 13991, 14016, 14051, 14055. Austria: 13938, 13948, 13958, 13968, 13978. France: 13910-13912, 13918-13919, 13970, 14003, 14019, 1…

  Held by

  The National Archives, Kew

  Date

  1923 Aug

  Reference

  HW 12/49

• Catalogue level

  Piece

  Instructions of 19 April 1945 (together with Admiralty implementation papers), to...

  Instructions of 19 April 1945 (together with Admiralty implementation papers), to be seen by all cleared for ULTRA that they are never to reveal, mention, hint at, write or lecture about the ULTRA secret (together with rationale for this ban); issued…

  Held by

  The National Archives, Kew

  Date

  1945 Apr 19

  Reference

  HW 49/7

• Catalogue level

  Piece

  Signals concerning weather cyphers

  Signals concerning weather cyphers

  Held by

  The National Archives, Kew

  Date

  1940 Dec 30 - 1944 Mar 11

  Reference

  HW 51/49

• Catalogue level

  Piece

  Reports compiled from Japanese naval air decrypts providing additional information...

  Reports compiled from Japanese naval air decrypts providing additional information on the ASJN series of reports

  Held by

  The National Archives, Kew

  Date

  1943 Nov 24-1944 Sep 30

  Reference

  HW 27/49

• Catalogue level

  Piece

  Italian naval messages

  Italian naval messages

  Held by

  The National Archives, Kew

  Date

  1939 Jun 05-1939 Aug 16

  Reference

  HW 18/49