On 11 September 1999, Melita Norwood, then 87, was publicly unmasked as a longtime Soviet spy following revelations from KGB defector Vasili Mitrokhin's archive.
On 11 September 1999, Melita Norwood, by then an 87-year-old grandmother living quietly in Bexleyheath, southeast London, was publicly exposed as a Soviet spy. The revelation followed the publication of The Mitrokhin Archive, a book co-authored by historian Christopher Andrew and former KGB archivist Vasili Mitrokhin, who had smuggled thousands of secret Soviet intelligence files to Britain after defecting in 1992.
The disclosure caused a media sensation: dubbed the "granny spy" by the British press, Norwood became the public face of Soviet espionage in Britain, having passed secrets — including information related to Britain's atomic weapons research via her work at the British Non-Ferrous Metals Research Association — to Soviet intelligence for decades without detection, from 1937 until her retirement from active espionage in 1972.
Despite the scale of her disclosed activity, British authorities announced that Norwood would not be prosecuted, citing her advanced age and the passage of time. The case sparked public debate about intelligence failures, the effectiveness of MI5's historic vetting procedures, and the extraordinary length and success of her concealment. It cemented her legacy as arguably the most significant and longest-active female Soviet agent uncovered in the West, later inspiring the film Red Joan (2018), loosely based on her story.