The MI5 Archive
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Regnum Defende: Defend the Realm. MI5, the intelligence agency responsible for protecting the UK against threats to national security, has acted under this motto since it was founded in 1909. This has involved the management of secrets over the decades: secrets for which vast swathes of information are now declassified.
Detailing uprisings and executions, double agents and femmes fatales from across the globe, The MI5 Archive presents a window into the world of spycraft that has kept British democracy safe. Rummage through documents received anonymously to the shadowy PO Box 500, London, W2. Work out what has value and how to decode it, with experts at your shoulder: authors and archivists Mark Dunton and Stephen Twigge have had unparalleled access.
Within you will find source material on the Siege of Sidney Street, the Cambridge Spy Ring and the Profumo Affair, and never-before-published imagery prepared exclusively for this book and the National Archives’ hit exhibition ‘MI5: Official Secrets’.
From interrogations to surveillance logs, coded messages to intercepted phone calls, The MI5 Archive charts the clandestine activities of MI5 right from its inception.
Detailing uprisings and executions, double agents and femmes fatales from across the globe, The MI5 Archive presents a window into the world of spycraft that has kept British democracy safe. Rummage through documents received anonymously to the shadowy PO Box 500, London, W2. Work out what has value and how to decode it, with experts at your shoulder: authors and archivists Mark Dunton and Stephen Twigge have had unparalleled access.
Within you will find source material on the Siege of Sidney Street, the Cambridge Spy Ring and the Profumo Affair, and never-before-published imagery prepared exclusively for this book and the National Archives’ hit exhibition ‘MI5: Official Secrets’.
From interrogations to surveillance logs, coded messages to intercepted phone calls, The MI5 Archive charts the clandestine activities of MI5 right from its inception.
Extent: 368 pp
Format: Hardback
Illustrations: 347
Publication date: 2026-09-03
Size: 26.4 x 20.6 cm
ISBN: 9780500030455
Format: Hardback
Illustrations: 347
Publication date: 2026-09-03
Size: 26.4 x 20.6 cm
ISBN: 9780500030455
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About the Authors
Mark Dunton is Principal Records Specialist at the National Archives, London, and has in-depth knowledge of researching public records, with a particular interest in 20th-century British political, social and economic history.
Stephen Twigge is the former Head of Modern Collections at the National Archives, London. He was previously a historian at the Foreign and Commonwealth Office and has published a number of books and articles on the Cold War.
Nick Harkaway is the bestselling author of eight novels, including The Gone-Away World, Titanium Noir and Karla’s Choice, the latest instalment of the George Smiley series created by his father, John le Carré.