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• Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1944 Sep 01-1945 Apr 20

  Reference

  HW 52/38

• Analytic notes on the 8FN group (Moscow to Comintern agents abroad): GC and CS request...

  Held by

  The National Archives, Kew

  Date

  1933 Dec

  Reference

  HW 17/38

• Co-operation with Russia on German naval communications

  Held by

  The National Archives, Kew

  Date

  1942 Jun 01 - 1942 Aug 31

  Reference

  HW 61/38

• Security of electronic communications

  Held by

  Creating government department or its successor

  Date

  1954 Feb-1955 May

  Reference

  HW 9/38

• Resubordination of GCCS: ministerial correspondence reflecting transfer of GCCS from...

  Held by

  The National Archives, Kew

  Date

  1921

  Reference

  HW 3/38

• Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Aug 01-1940 Aug 03

  Reference

  HW 29/38

• Security

  Held by

  The National Archives, Kew

  Date

  1942 Feb 24 - 1943 Dec 11

  Reference

  HW 64/38

• American Liaison Letters. Bodsworth letters BWX/2-67 (Nos. 1, 13, 53, 59-66 not listed),...

  Held by

  The National Archives, Kew

  Date

  1945 Mar 29-1945 Dec 03

  Reference

  HW 8/38

• List of GCCS sections by hut and room number and with associated senior personnel;...

  Held by

  The National Archives, Kew

  Date

  1942 May 21-31

  Reference

  HW 14/38

• Reports in the series QT/3501 to QT/4000.

  Held by

  The National Archives

  Date

  1942 Oct 14-1942 Oct 21

  Reference

  HW 20/38

• Japanese diplomatic messages between Ministry of Foreign Affairs, Tokyo, and Japanese...

  Held by

  The National Archives, Kew

  Date

  1943 Jul 05-1944 Nov 09

  Reference

  HW 38/1

• Commercial messages passed over diplomatic channels

  Held by

  The National Archives, Kew

  Date

  1945 Apr 01-1945 Apr 30

  Reference

  HW 32/38

• Italian Armistice Commission active in French North Africa. More on Japanese operations...

  Held by

  The National Archives, Kew

  Date

  1942 Mar 25-1942 May 13

  Reference

  HW 21/38

• RAF Middle East summaries (second series) describing enemy operational activity,...

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01-1943 Apr 09

  Reference

  HW 41/38

• German air force grid system

  Held by

  The National Archives, Kew

  Date

  1941 Mar 22

  Reference

  HW 51/38

• GRU (Soviet Intelligence) Military Attaché Traffic: Moscow to Paris, France. (Described...

  Held by

  The National Archives, Kew

  Date

  1940 Apr 11-1940 Apr 28

  Reference

  HW 15/38

• Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Oct 18-1943 Oct 21

  Reference

  HW 23/38

• Decrypts of all other GP codes other than No 3, issued as BP daily reports in GPD...

  Held by

  The National Archives, Kew

  Date

  1943 July-Nov

  Reference

  HW 16/38

• Some Italian Y Service reports

  Held by

  The National Archives, Kew

  Date

  Nov 13 1941-Nov 22 1941

  Reference

  HW 5/38

• The Battle of the Atlantic Operational Intelligence Centre Special Summary. This...

  Held by

  The National Archives, Kew

  Date

  1939 - 1945

  Reference

  HW 11/38