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PDF 82 Apr 16 Fr Declassified documents Major Archive (TNA) Falklands: Sir Antony Duff letter to JIC Representative Washington ("Water under the bridge") [concern that Haig might accidentally reveal British SIGINT to Argentinians] [declassified May 2023]
PDF 82 Apr 21 We Declassified documents Major Archive (TNA) Falklands: JIC Representative Washington letter to Sir Antony Duff ("Water under the bridge") ["nagging doubt" remains that Haig revealed British SIGINT of San Luis orders to Argentinians] [declassified May 2023]
PDF 82 Apr 26 Mo Declassified documents Major Archive (TNA) Falklands: GCHQ notes of meeting ("Falklands: Notes of Meeting on 26 April 1982") [current intelligence including Santa Fé; Argentine submarine group; ELINT giving location for Argentine carrier off Bahia Blanca; "present facilities provided by Endurance were essential"] [declassified May 2023]
PDF 82 Apr 26 Mo Declassified documents Major Archive (TNA) Falklands: CTG317.9 signal to CTF317 (1445Z) ("Operation Paraquet") [informal conversation with captured Argentine officers; condition of Santa Fé; cryptographic material not disposed of] [declassified May 2023]
PDF 82 Apr 27 Tu Declassified documents Major Archive (TNA) Falklands: CINCFLEET letter to Director GCHQ (thanks) ["tremendous service since Operation CORPORATE began. ... the foundation for the successful South Georgia operation"] [declassified May 2023]
PDF 82 Apr 27 Tu Declassified documents Major Archive (TNA) Falklands: GCHQ notes of meeting ("Falklands: Notes of Meeting on 27 April 1982") [current intelligence including San Luis; replacing facilities provided by HMS Endurance] [declassified May 2023]
PDF 82 Apr 27 Tu Declassified documents Key Archive (TNA) Falklands/JIC: GCHQ London signal to GCHQ Cheltenham (?1330Z) ("Special JIC highlights on 27 April 1982" - JIC(82)20th Meeting) [immediate assessments - "somewhat embarrassed DGI" conveyed Chiefs of Staff worries, receiving same intelligence multiple times; revised arrangements; AOB - Wright gave general account of crisis, Haig proposals "not ideal" from UK perspective, Pym recommends them but cabinet not yet in agreement, FCO expects Argentine rejection, Haig takes opposite view - if he is right UK will be under "strong US pressure"] [declassified May 2023]
PDF 82 Apr 28 We Declassified documents Major Archive (TNA) Falklands: GCHQ notes of meeting ("Falklands: Notes of Meeting on 28 April 1982") [current intelligence including Soviet aircraft on Cuba; equipment and personnel on HMS Intrepid; replacing facilities provided by HMS Endurance; risks of action-on procedure lowering classification of SIGINT for operational use - Chiefs to be warned] [declassified May 2023]
PDF 82 Apr 28 We Declassified documents Major Archive (TNA) Falklands: Flag Officer Submarines (FOSM) signal to GCHQ (0827Z) ("Ref request for San Luis/Spartan movements") [British SSN seeking to attack Argentine submarine] [declassified May 2023]
PDF 82 Apr 28 We Declassified documents Major Archive (TNA) Falklands: Sir Antony Duff letter to Director GCHQ (15/16 April security concerns about Haig revealing British SIGINT to Argentina) [updates Tovey] [declassified May 2023]
PDF 82 Apr 29 Th Declassified documents Major Archive (TNA) Falklands/JIC: GCHQ London signal to GCHQ Cheltenham (1000Z) ("Herewith JIC highlights on 29 April 1982" - JIC(82)21st Meeting) [Soviet long-term interests in Argentina and the Falklands - Wright and DGI "felt that this appeared (rather than was) too complacent in tone", minor amendments; Falklands - Pym speaking to Healey regarding Rowlands; Wright said Argentine reaction on Haig proposals awaited, Haig asked to delay statement ending "his mediation" until after Commons rose; "overll aim" then would be for UK to continue negotiating by most promising alternative channel (UN unlikely) and persuade US to side with us] [declassified May 2023]
PDF 82 Apr 29 Th Declassified documents Major Archive (TNA) Falklands: GCHQ notes of meeting ("Falklands: Notes of Meeting on 29 April 1982") [praise of GCHQ service from all quarters; Soviet aircraft in Cuba; HMS Intrepid; messages about San Luis; Daily Mail article on Santa Fé captures] [declassified May 2023]
PDF 82 Apr 29 Th Declassified documents Major Archive (TNA) Falklands/JIC: GCHQ London signal to GCHQ Cheltenham (1730Z) ("From Director for circulation") [tells of "immensely high regard" for SIGINT in present crisis; War Cabinet 24 Apr from PM down spoke "in glowing terms"; CDS "what SIGINT is producing is 500 percent marvellous" (sic); DGI said SIGINT "virtually the only hard operational intelligence we have"; Tovey's pride at GCHQ's achievement] [declassified May 2023]
PDF 82 May 4 Tu Declassified documents Major Archive (TNA) Falklands/JIC: GCHQ London signal to GCHQ Cheltenham (?1330-1600Z) ("Herewith JIC highlights for 4 May 1982" - ?JIC(82)22nd Meeting) [review of daily assessments on the Falklands; possible unorthodox Argentinian attacks; PR aspects of Belgrano sinking - very difficult to substantiate threat it posed without revealing intelligence sources; Inman farewell visit] [declassified May 2023]
PDF 82 May 4 Tu Declassified documents Minor Archive (TNA) Falklands: GCHQ minute ("Emergency SIGINT briefing - Falklands Governor") [dispute between GCHQ and FCO regarding indoctrination of Governor and marine commander on 31 March] [declassified May 2023]
PDF 82 May 5 We Speeches, interviews, etc. Major Archive (TNA) Falklands: GCHQ notes of meeting ("Falklands: Notes of Meeting on 5 May 1982") [current intelligence - no SIGINT on Sheffield sinking; San Luis ordered to go to the area; Argentine SIGINT and fixes on the Task Force] [declassified May 2023]
PDF 82 May 5 We Declassified documents Major Archive (TNA) Falklands/JIC: GCHQ minute ("SIGINT Alert MARGAY: Requirements of 22 SAS, Hereford") [to be sent any information on Argentine ORBAT, deployment, equipment or operations on or around Falklands; no other recipients to know a report has been copied to SAS] [declassified May 2023]
PDF 82 May 5 We Declassified documents Major Archive (TNA) Falklands/JIC: BDS Washington signal to MODUK (2100Z) ("Press reporting on US/UK intelligence cooperation during the Falkland crisis") [Tovey conversation with Director Defense Intelligence Agency - difficulty preventing US media securing sensitive intelligence information] [declassified May 2023]
PDF 82 May 9 Su Declassified documents Major Archive (TNA) Falklands/JIC: GCU Northwood signal to GCHQ (1315Z) ("DIS organisation for Falklands crisis") [MOD intelligence analysis - designed to support political decision-making] [declassified May 2023]
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Documents lie at the core of this website, each one dated and sorted chronologically (by default) in search results. Most are images in PDF format of original paper documents scanned or filmed for the site. There also transcripts of speeches and interviews, press articles, photos, videos, and more. The document database contains tens of thousands of items and permits complex searching.

Files are multi-page PDFs from which most of the documents on the site are selected. All of Mrs Thatcher’s official files from No.10 are available in full on this site (paper copies are stored at the National Archives in the series PREM19), as well as most of those of Geoffrey Howe and Nigel Lawson as Chancellor (stored at TNA as series T639 and T640).

Guides are articles about key events and topics. Many were written to accompany annual releases of Mrs Thatcher’s private and party papers at the Churchill Archive Centre in Cambridge.

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