The exhibition "MI5: Official Secrets" marks an unprecedented collaboration between the intelligence agency and The National Archives, offering the public a first-ever glimpse into MI5's classified ...

A 110-year-old lemon that played a key role in espionage history is one of the star attractions of a London exhibition drawn from the files of British spy agency MI5.

A battered leather briefcase left behind by Guy Burgess when he fled to Moscow in 1951 is among 20 objects from MI5's ...

A briefcase left behind by infamous Cambridge spy Guy Burgess as he fled to Moscow in 1951 is among never-before-seen MI5 artefacts being opened up to the public for the first time. The MI5 ...

A briefcase left behind by infamous Cambridge spy Guy Burgess as he fled to Moscow in 1951 is among never-before-seen MI5 ...

A briefcase left behind by infamous Cambridge spy Guy Burgess as he fled to Moscow in 1951 is among never-before-seen MI5 artefacts going on display at The National Archives in Kew, South-West London.

The Cold War section includes one of the two briefcases left by Guy Burgess at his London club, when he fled to Moscow in 1951 with fellow spy Donald Maclean. It is marked with his initials.

A briefcase abandoned by infamous Cambridge spy Guy Burgess as he fled to Moscow in 1951 is among the never-before-seen MI5 artefacts going on display at The National Archives in Kew, south-west ...