Queen Elizabeth II was not officially informed for nearly a decade that Anthony Blunt was a Soviet spy, newly declassified documents reveal.

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.

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.