A 110-year-old lemon used by a German WW1 spy to send secret ... Ring member Anthony Blunt, the Queen’s Picture Surveyor, collected one of the cases and gave it to MI5 after removing damning ...

A desiccated 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 MI5, Britain’s domestic ...