Cambridge spy Kim Philby's denial of espionage

Kim Philby denied being a Soviet agent while working for MI6 during the 1950s and early 1960s.

Philby then fled to Russia in 1963 and when he died in 1988, he was given a burial in a Moscow cemetery with full military honours.

Now, the BBC has uncovered previously unseen footage of Philby describing his career as a Soviet agent to the Stasi, the East German Intelligence Service, in 1981.