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

Anthony Blunt after he was publicly unmasked as a ... Miranda Carter, who wrote a 2001 biography of Blunt, said she believed the Queen would have been told informally some time after 1965.

Newly-declassified files show the Queen was only told the full story a decade after royal courtier confessed to spying for the KGB.

In 1964, Sir Anthony Blunt, the surveyor of the Queen ... Miranda Carter, who wrote a 2001 biography of Blunt, said she believed the Queen would have been told informally some time after 1965.