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• Soviet Air Force continuing air offensive activity against 2nd Gruppe (GAF). Request...

  Held by

  The National Archives, Kew

  Date

  1941 Sept 3

  Reference

  HW 1/42

• Forms 540 - War Diary Part A

  Held by

  The National Archives, Kew

  Date

  1944 Jul 15-1945 Jun 02

  Reference

  HW 2/42

• W/T Board -miscellaneous documents Board formed after the First World War to replace...

  Held by

  The National Archives, Kew

  Date

  1936 Jan 01-1938 Jul 29

  Reference

  HW 42/2

• Payment of rates by Bletchley Park and its outstations

  Held by

  The National Archives, Kew

  Date

  1939 Sep 02 - 1940 Aug 14

  Reference

  HW 64/42

• Co-operation with Russia on German military communications

  Held by

  The National Archives, Kew

  Date

  1942 Dec 06 - 1942 Dec 17

  Reference

  HW 61/42

• History of Italian Field Y during the 'CRUSADER' Campaign (1941-1942) with particular...

  Held by

  The National Archives, Kew

  Date

  1941 Nov 18 - 1942 Jan 17

  Reference

  HW 50/42

• GC&CS Naval Cryptanalytic Studies Volume XVII: Japanese Naval Attache Hand Cyphers...

  Held by

  Creating government department or its successor

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/42

• Communications Subcommittee and 'E' Subcommittee Minutes of meetings 1-34 of the...

  Held by

  The National Archives, Kew

  Date

  1941 Mar 17-1943 Oct 15

  Reference

  HW 42/24

• Y Committee, Aug - Dec 1942 Subjects discussed include: liaison with US, including...

  Held by

  The National Archives, Kew

  Date

  1942 Aug 04-1942 Dec 30

  Reference

  HW 42/7

• Minutes of periodic DF Conferences attended by representatives from stations in the...

  Held by

  The National Archives, Kew

  Date

  1943 Nov 10-1945 Jul 17

  Reference

  HW 42/27

• Sigint Board, Sept - Dec 1945 - minutes of meetings and other papers

  Held by

  Creating government department or its successor

  Date

  1945 Sep 03-1945 Dec 28

  Reference

  HW 42/16

• Miscellaneous papers relating to the organisation and composition of the Sigint Committees...

  Held by

  The National Archives, Kew

  Date

  1941 Oct 25-1946 Jul 04

  Reference

  HW 42/29

• Dossiers on Sigint Boards & Committees: notes on evolution of committee structure...

  Held by

  The National Archives, Kew

  Date

  1924 Jan 01-1945 Sep 03

  Reference

  HW 42/31

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

  Held by

  The National Archives, Kew

  Date

  1943 Jan 07-1943 Oct 19

  Reference

  HW 42/10

• UK copies of minutes and other papers relating to a number of Middle East Y Boards...

  Held by

  The National Archives, Kew

  Date

  1941 Mar 10-1945 May 07

  Reference

  HW 42/18

• Commercial messages passed over diplomatic channels

  Held by

  The National Archives, Kew

  Date

  1945 Jul 01-1945 Jul 16

  Reference

  HW 32/42

• Allied naval force at sea in Cyprus area leads Rome to issue warning of impending...

  Held by

  The National Archives, Kew

  Date

  1942 Nov 8-1942 Dec 20

  Reference

  HW 21/42

• For file L1(C) on OVERLORD, see HW 40/6

  Held by

  The National Archives, Kew

  Date

  Reference

  HW 40/42

• Reports of Japanese army air decrypts with subject headers

  Held by

  The National Archives, Kew

  Date

  1944 Jun 01-1944 Aug 27

  Reference

  HW 28/42

• Reports of Japanese naval air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 May 16-1945 Jul 24

  Reference

  HW 27/42