The files about royal art historian Anthony Blunt are among a trove from the intelligence agency MI5 released Tuesday by Britain’s National Archives.

Documents newly declassified by MI5, Britain's internal intelligence agency, show the late Queen Elizabeth II was not informed for almost 10 years that a member of her staff had spied for the then-Soviet Union.

Anthony Blunt, a royal art historian, confessed in 1964 to spying for the Soviets, but the late queen was not officially told about his past until 1973. View on euronews

The identity of a Russian spy among Queen Elizabeth II's courtiers was kept from the monarch for almost a decade, but she took the news with her typically calm demeanour

Queen Elizabeth II wasn’t told details of her long-time art adviser's double life as a Soviet spy because palace officials didn’t want to add to her worries, newly declassified documents reveal.

Queen Elizabeth II was kept in the dark for a long time about a major scandal during her reign. Newly released MI5 files reveal that, for nearly 10 years, the late monarch didn’t know that royal household member Anthony Blunt was actually a Soviet double agent.

Art historian Anthony Blunt was for decades Surveyor of the Queen's Pictures, overseeing the official Royal Art Collection, and in 1964 admitted he had been a Soviet agent since t

Documents newly declassified by MI5, Britain's internal intelligence agency, show the late Queen Elizabeth II was not informed for almost 10 years that a member of her staff had spied for the then-Soviet Union.

Queen Elizabeth II was not told officially for nearly a decade that one of her most senior courtiers had admitted he was a Soviet spy, newly declassified British files revealed Tuesday.

Newly released documents from British intelligence reveal new secrets about the late queen’s former art adviser.