23/10/2026
Yesterday, over 100 MI5 (Security Service) top-secret files were released by The National Archives.
MI5 have released and transferred historical files to our archive in Kew since 1997, either in the spring or the autumn.
This latest release covers the period from the 1930s to the 1970s. These items, that were once considered 'secret' or 'top secret', cover the world of politics, entertainment, and Soviet double agents.
Among those featured are NHS founder Aneurin Bevan and renowned 20th-century composer Sir Michael Tippett, whose files shed new light on how MI5 monitored influential individuals.
Find out more through our latest blog here: https://www.nationalarchives.gov.uk/explore-the-collection/the-collection-blog/a-file-release-from-mi5/
Catalogue references:
KV 2/4767 (Mr and Mrs VEX in New Oxford Street on 1 January 1965)
KV 2/4777 (Document relating to details of the spycraft involved in Bossard’s case.)
KV 2/4860 (Michael Tippett)
KV 2/4858 (Document relating to Arnold Ridley)