14 (UPI) --Documents newly declassified by MI5, Britain's internal intelligence agency ... only told her about the infamous Cambridge Five member and art historian, Anthony Blunt, who was employed as the monarch's surveyor of official pictures, in 1973 ...

Anthony Blunt, who worked at Buckingham Palace as Surveyor of the Queen’s Pictures, was secretly a Soviet spy during WWII.

Queen Elizabeth II was not officially informed for almost a decade that one of her most senior courtiers had confessed to being a Soviet spy, according to newly released MI5 files.

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

When the Queen was finally told the full story in the 1970s, she was characteristically unflappable - taking it "all very calmly and without surprise".

Queen Elizabeth was left in the dark for almost a decade over the full scale of the treachery of one of her most senior courtiers, according to newly-released official files

Newly declassified British documents show that 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.

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.

Members of the spy ring in the 1930s spilled secrets to the Soviet Union from the heart of the U.K. intelligence establishment.

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.