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

  Soviet Air Force continuing air offensive activity against 2nd Gruppe (GAF). Request to amalgamate German fighter groups refused by Goering: leave granted to air crews for whom there are no serviceable aircraft. 4th Air Fleet operational orders for S…

  Held by

  The National Archives, Kew

  Date

  1941 Sept 3

  Reference

  HW 1/42

• Catalogue level

  Piece

  Forms 540 - War Diary Part A

  Forms 540 - War Diary Part A

  Held by

  The National Archives, Kew

  Date

  1944 Jul 15-1945 Jun 02

  Reference

  HW 2/42

• Catalogue level

  Piece

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

  W/T Board -miscellaneous documentsBoard formed after the First World War to replace the Joint Naval and Military Wireless Telegraphy Committee. Prior to 1939, the Board issued handbooks giving details of foreign Naval, Military and Air wireless commu…

  Held by

  The National Archives, Kew

  Date

  1936 Jan 01-1938 Jul 29

  Reference

  HW 42/2

• Catalogue level

  Piece

  Payment of rates by Bletchley Park and its outstations

  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

• Catalogue level

  Piece

  Co-operation with Russia on German military communications

  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

• Catalogue level

  Piece

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

  History of Italian Field Y during the 'CRUSADER' Campaign (1941-1942) with particular reference to Mobile Section No. 2 SWG [Special Wireless Group] (MOBSEC). Sigint in the field in the Libyan desert

  Held by

  The National Archives, Kew

  Date

  1941 Nov 18 - 1942 Jan 17

  Reference

  HW 50/42

• Catalogue level

  Piece

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

  GC&CS Naval Cryptanalytic Studies Volume XVII: Japanese Naval Attache Hand Cyphers by F G W Bowe, H R Foss, D R Grey and J Love

  Held by

  Creating government department or its successor

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/42

• Catalogue level

  Piece

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

  Communications Subcommittee and 'E' Subcommittee Minutes of meetings 1-34 of the Communications Subcommittee, set up to oversee Y communications requirements: 29 May 1942 - 15 Oct 1943. This committee was superseded by the B Committee of the Signal I…

  Held by

  The National Archives, Kew

  Date

  1941 Mar 17-1943 Oct 15

  Reference

  HW 42/24

• Catalogue level

  Piece

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

  Y Committee, Aug - Dec 1942Subjects discussed include: liaison with US, including a US report on the British Y Service Y committees in North and West Africa and the South Atlantic terms of reference for Y Board and Y Committees, at home and overseas…

  Held by

  The National Archives, Kew

  Date

  1942 Aug 04-1942 Dec 30

  Reference

  HW 42/7

• Catalogue level

  Piece

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

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

  Held by

  The National Archives, Kew

  Date

  1943 Nov 10-1945 Jul 17

  Reference

  HW 42/27

• Catalogue level

  Piece

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

  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

• Catalogue level

  Piece

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

  Miscellaneous papers relating to the organisation and composition of the Sigint Committees and Subcommittees

  Held by

  The National Archives, Kew

  Date

  1941 Oct 25-1946 Jul 04

  Reference

  HW 42/29

• Catalogue level

  Piece

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

  Dossiers on Sigint Boards & Committees: notes on evolution of committee structure and subjects discussed

  Held by

  The National Archives, Kew

  Date

  1924 Jan 01-1945 Sep 03

  Reference

  HW 42/31

• 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

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

  UK copies of minutes and other papers relating to a number of Middle East Y Boards and Committees, including Gibraltar and North Africa. A West Africa Committee was also proposed, but did not meet. Y Middle East Board (became Middle East Sigint Board…

  Held by

  The National Archives, Kew

  Date

  1941 Mar 10-1945 May 07

  Reference

  HW 42/18

• Catalogue level

  Piece

  Commercial messages passed over diplomatic channels

  Commercial messages passed over diplomatic channels

  Held by

  The National Archives, Kew

  Date

  1945 Jul 01-1945 Jul 16

  Reference

  HW 32/42

• Catalogue level

  Piece

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

  Allied naval force at sea in Cyprus area leads Rome to issue warning of impending naval and air attack on Aegean islands (ASI 3012) Italian fighter Gruppo in Tunisia to be withdrawn to avoid embarrassment to relations between German and French comman…

  Held by

  The National Archives, Kew

  Date

  1942 Nov 8-1942 Dec 20

  Reference

  HW 21/42

• Catalogue level

  Piece

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

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

  Held by

  The National Archives, Kew

  Date

  Reference

  HW 40/42

• Catalogue level

  Piece

  Reports of Japanese army air decrypts with subject headers

  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

• Catalogue level

  Piece

  Reports of Japanese naval air decrypts

  Reports of Japanese naval air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 May 16-1945 Jul 24

  Reference

  HW 27/42