Declassified documents confirm that the late Queen Elizabeth II of England was not informed until many years later that she had a KGB spy amongst her members of staff. She didn't like him anyway. Secrecy is the art of espionage.

Notorious double agent Anthony Blunt feared that his KGB handler would turn violent when he refused ... had all been recruited by the Russians while or after studying at Cambridge University in the 1930s. In the years that followed, they were able to ...

Queen Elizabeth II was not told about her long-time art adviser's double life as a Soviet spy, newly declassified documents reveal.

Trove of newly declassified files detail investigations into some of country’s most notorious double agents the ‘Ring of Five’ who passed information to Soviets for three decades