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  Piece

  Probable Japanese estimate of Allied Land Forces SE Asia future operations

  Probable Japanese estimate of Allied Land Forces SE Asia future operations

  Held by

  The National Archives, Kew

  Date

  1945 Aug 10-1945 Aug 31

  Reference

  HW 33/3

• Catalogue level

  Piece

  Civil and diplomatic Sigint: history of development of civil international Sigint...

  Civil and diplomatic Sigint: history of development of civil international Sigint at Berkeley Street, 1939-1945, by CLS Williams; history of Distribution and Reference (D&R) Section there, with breakdown of Sigint report totals to ministries and …

  Held by

  The National Archives, Kew

  Date

  1945-1946

  Reference

  HW 3/162

• Catalogue level

  Piece

  No 30, History of NID8G: Leonard Forster's very critical review of this section,...

  No 30, History of NID8G: Leonard Forster's very critical review of this section, Admiralty's Sigint cell in Room 13, Admiralty basement; Forster's covering letter to Commander Saunders, a previous head of ID8G, asking for comments on the history and …

  Held by

  The National Archives, Kew

  Date

  1945

  Reference

  HW 3/134

• Catalogue level

  Piece

  Y Sub-committee: minutes, special meetings and programmes. Y Sub-committee was the...

  Y Sub-committee: minutes, special meetings and programmes. Y Sub-committee was the executive arm of the Coordination of Interception and Cryptography Committee. It was chaired by the Head of the Government Code and Cypher School and had as its member…

  Held by

  The National Archives, Kew

  Date

  1933 Nov 01-1938 Oct 27

  Reference

  HW 42/3

• Catalogue level

  Piece

  No 31, reminiscences of Miss Senyard, head of Naval Section Secretariat: first handwritten...

  No 31, reminiscences of Miss Senyard, head of Naval Section Secretariat: first handwritten draft; first typed version with editorial amendments; final typed version

  Held by

  The National Archives, Kew

  Date

  1945-1946

  Reference

  HW 3/135

• Catalogue level

  Piece

  C's visit to Foreign Office of Apr 30 to discuss Foreign Office taking on and funding...

  C's visit to Foreign Office of Apr 30 to discuss Foreign Office taking on and funding police Sigint unit at Denmark Hill from the Metropolitan Police

  Held by

  The National Archives, Kew

  Date

  1937 May

  Reference

  HW 3/79

• Catalogue level

  Piece

  Air Section initial sub-section drafts for main German Air Section history: account...

  Air Section initial sub-section drafts for main German Air Section history: account of SALU; account of SALU/Med; Eastern Front research, the Russian SALU; BMP/D, the day-fighter section; BMP/N, the night-fighter section; history of BMP/N the fighter…

  Held by

  The National Archives, Kew

  Date

  1945

  Reference

  HW 3/110

• Catalogue level

  Piece

  German Army and Navy monitor diplomatic communications and prove German Foreign Office...

  Transferred from HW 7/14 in August 1995

  Held by

  The National Archives, Kew

  Date

  1917 Mar-Aug

  Reference

  HW 3/181

• Catalogue level

  Piece

  Weekly reports of the German Air sub-section concerning codes, intelligence traffic...

  Weekly reports of the German Air sub-section concerning codes, intelligence traffic analysis and personnel

  Held by

  The National Archives, Kew

  Date

  1943 Dec 11 - 1945 May 12

  Reference

  HW 56/3

• Catalogue level

  Piece

  Naval Section: listing of Japanese Historical Memoranda, nos 1-34, with details of...

  Naval Section: listing of Japanese Historical Memoranda, nos 1-34, with details of GCCS editorial committee members

  Held by

  The National Archives, Kew

  Date

  [c1945]

  Reference

  HW 3/154

• Catalogue level

  Piece

  Messages concerned with the relaying of enemy signals intercepted in the Far East

  Messages concerned with the relaying of enemy signals intercepted in the Far East

  Held by

  The National Archives, Kew

  Date

  1942 Jul 25 - 1945 Oct 19

  Reference

  HW 59/3

• Catalogue level

  Piece

  A description of Colorob. This report summarises the standards employed in the construction...

  A description of Colorob. This report summarises the standards employed in the construction of Colorob and in addition describes in detail its logical design and circuit operation of each basic unit of equipment

  Held by

  The National Archives, Kew

  Date

  1959 Jul 01

  Reference

  HW 76/3

• Catalogue level

  Piece

  Metropolitan Police Sigint unit at Denmark Hill: correspondence 1926-1932 from head...

  Metropolitan Police Sigint unit at Denmark Hill: correspondence 1926-1932 from head of police Sigint station at Denmark Hill, HC Kenworthy; minutes of Y Sub-Committee meeting of Oct 9 1934 discussing future of Metropolitan Police Sigint; corresponden…

  Held by

  The National Archives, Kew

  Date

  1932-1957

  Reference

  HW 3/81

• Catalogue level

  Piece

  C relaxes security restrictions at BP, official designation of GCCS in future to...

  C relaxes security restrictions at BP, official designation of GCCS in future to be Government Communications Headquarters (GCHQ); GCCS argues against establishing a Combined Cryptographic Bureau for the Middle East (ME), in Cairo; senior appointment…

  Held by

  The National Archives, Kew

  Date

  1940 Jan-Feb

  Reference

  HW 14/3

• Catalogue level

  Piece

  History of the Special Liaison Units (SLU) controlled by SLU 9 in the South West...

  History of the Special Liaison Units (SLU) controlled by SLU 9 in the South West Pacific Area1. Report by Squadron Leader S F BURLEY 2. Report by Squadron Leader R YEUDALL

  Held by

  The National Archives, Kew

  Date

  1944 Nov 16-1946 Mar 31

  Reference

  HW 49/3

• Catalogue level

  Piece

  Signals concerned with the interception of Middle East and North African communications

  Signals concerned with the interception of Middle East and North African communications

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1944 Feb 29

  Reference

  HW 68/3

• Catalogue level

  Piece

  MGB (Soviet Ministry of State Security) Traffic: Moscow with Sofia, Bulgaria. (Described...

  MGB (Soviet Ministry of State Security) Traffic: Moscow with Sofia, Bulgaria. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1945 Sept 16-1947 Mar 24

  Reference

  HW 15/3

• Catalogue level

  Piece

  Decrypts of intercepted diplomatic communications. Argentina: 779. Austria: 794....

  Decrypts of intercepted diplomatic communications. Argentina: 779. Austria: 794. Chile: 737-738, 868. Denmark: 609-610, 671, 842, 862, 872. Germany: 630, 669, 699, 723, 741, 754, 793, 810-811, 828-829, 860, 869-870. Greece: 602-608, 616-618, 629, 647…

  Held by

  The National Archives, Kew

  Date

  1919 Dec 23-1920 Jan 21

  Reference

  HW 12/3

• Catalogue level

  Piece

  Mathematical theory of ENIGMA machine by Alan Mathison Turing. (1) Also known as...

  theory of ENIGMA machine by Alan MathisonTuring. (1) Also known as 'Prof's book'. (2) Pages 8, 124-128 and 131 are missing. (3)

  Held by

  The National Archives, Kew

  Date

  1939 Jan 01 - 1942 Dec 31

  Reference

  HW 25/3

• Catalogue level

  Piece

  Appendices to British-US Communication Intelligence Agreement. Regulations for the...

  Appendices to British-US Communication Intelligence Agreement. Regulations for the Co-ordination of British-US Cryptanalysis, Traffic Analysis and Associated Techniques Regulations for the Co-ordination of the Exchange of Collateral Material Appendix…

  Held by

  The National Archives, Kew

  Date

  1946

  Reference

  HW 80/3