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• Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Oct 25-1940 Oct 28

  Reference

  HW 29/54

• Recommendations of Temporary Staffs Committee following report of the Royal Commission...

  Held by

  The National Archives, Kew

  Date

  1932-1933

  Reference

  HW 3/54

• Soviet Comintern messages: ISCOT 101-200

  Held by

  The National Archives, Kew

  Date

  1944 Apr 30-1944 July 19

  Reference

  HW 17/54

• Airfields in Italy

  Held by

  The National Archives, Kew

  Date

  1943 Oct 1-1943 Dec 31

  Reference

  HW 21/54

• Commercial messages passed over diplomatic channels

  Held by

  Creating government department or its successor

  Date

  1946 Apr 01-1946 Apr 30

  Reference

  HW 32/54

• Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1944 Aug 01-1945 Jun 30

  Reference

  HW 52/54

• 'Y' Services: War Instructions

  Held by

  The National Archives, Kew

  Date

  1939 Mar 06-1939 Mar 23

  Reference

  HW 2/54

• Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Dec 05-1943 Dec 08

  Reference

  HW 23/54

• GAF liaison staff in Italy questions report that English convoy was practically destroyed...

  Held by

  The National Archives, Kew

  Date

  1941 Sept 8

  Reference

  HW 1/54

• Miscellaneous correspondence on German weather messages

  Held by

  The National Archives, Kew

  Date

  1939 Oct 06 - 1940 Apr 03

  Reference

  HW 54/13

• Correspondence with Middle East signals intercept sites

  Held by

  The National Archives, Kew

  Date

  1941 Feb 11 - 1943 May 10

  Reference

  HW 54/12

• Correspondence with the RAF intercept site at Dunstable, Bedfordshire, and the Meteorological...

  Held by

  The National Archives, Kew

  Date

  1940 Apr 30 - 1942 Nov 10

  Reference

  HW 54/7

• Correspondence and notes on Japanese meteorological codes

  Held by

  The National Archives, Kew

  Date

  1944 Mar 21 - 1945 Aug 19

  Reference

  HW 54/11

• Correspondence with Department of Defense, Washington DC

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 15

  Reference

  HW 54/6

• Itakian naval messages

  Held by

  The National Archives, Kew

  Date

  1940 Jun 27-1941 Jun 10

  Reference

  HW 18/54

• Correspondence with USA on European cyphers

  Held by

  The National Archives, Kew

  Date

  1944 Jan 03 - 1944 Dec 24

  Reference

  HW 54/9

• Correspondence with the Meteorological Office at the Air Ministry

  Held by

  The National Archives, Kew

  Date

  1940 Mar 13 - 1941 Oct 27

  Reference

  HW 54/18

• RAF - CMC and ALAMETCO. Missing at transfer

  Held by

  The National Archives, Kew

  Date

  1942 Jan 01 - 1945 Dec 31

  Reference

  HW 40/54

• Noise Interception and RCM [radio countermeasures]. Notes on the problems of intercepting...

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Apr 18

  Reference

  HW 50/54

• Liaison with the French on German meteorological cyphers

  Held by

  The National Archives, Kew

  Date

  1939 Dec 13 - 1940 May 13

  Reference

  HW 54/17