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Document release

Latest MI5 files released

Today we have made available to the public 24 previously top secret files from the UK Security Service, or MI5. The records cover a range of subjects...

Tags: espionage, file release, mi5

Document release

Latest MI5 files released

Today we have made available to the public 137 previously top secret files from the UK Security Service, or MI5.

Tags: document release, espionage, file release, mi5, second world war, security service

Document release

Subject files

Communist Activities in Universities & Colleges Cambridge University; Socialist Club; Minute Book 1928-1935, aliases CUSS, Labour Club Catalogue...

Tags: espionage, mi5, spies

Document release

Soviet Intelligence Agents and suspected agents

Guy Burgess aliases Roger Styles, Jim Andreyevich Eliot Catalogue reference: KV 2/4102 Date range: 4 June 1951–12 June 1951 This file has been digitised. Among...

Tags: espionage, mi5, spies

Document release

Security Service ‘list’ files

Leakage of Top Secret Foreign Office Telegrams in the USA: Evidence and Investigation Catalogue reference: KV 6/140-145 Covering dates: 27 January 1949–6...

Tags: espionage, mi5, spies

Document release

Foreign and Commonwealth Office files

Investigation into the leak of Foreign Office telegrams from the British Embassy, Washington, DC to the Russians, March 1945 Catalogue reference: FCO...

Tags: espionage, mi5, spies

Document release

File release: Cold War Cambridge spies Burgess and Maclean

Today we are releasing over 400 files from the Security Service (MI5), Foreign and Commonwealth Office and Cabinet Office which focus on Cold War investigations...

Tags: cold war, espionage, mi5, spies

Document release

Cabinet Office files

Report of Cadogan Committee of Enquiry and consequences of the Burgess and Maclean affair Catalogue reference: CAB 301/120 Date range: 21 June 1951–1...

Tags: espionage, mi5, spies

Document release

Subject of Security Service enquiry

Robert John Graham Boothby MP alias Lord Boothby Catalogue reference: KV 2/4095 Date range: 18 December 1928–2 May 1941 This file has been digitised. This...

Tags: espionage, mi5, spies

Document release

Latest top secret MI5 files released

Today we have made available to the public 102 previously top secret files from the UK Security Service – sometimes known as MI5. The files reveal...

Tags: cold war, document release, file release, mi5, second world war, security service

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Previous document releases

Read more about files we've released in previous years.