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 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.

Sir Anthony Blunt, the royal family's picture surveyor and renowned art historian, finally admitted that he had been a Soviet agent since the 1930s