Greville Maynard Wynne (19 March 1919 – 28 February 1990) was a British engineer and businessman recruited by MI6 because of his frequent travel to Eastern Europe. He acted as a courier to transport top-secret information to London from Soviet agent Oleg Penkovsky. Wynne and Penkovsky were both arrested by the KGB in November 1962, when some of the information their endeavours produced was of assistance to the West during the Cuban Missile Crisis. They were convicted of espionage. Penkovsky was executed the following year and Wynne was sentenced to eight years imprisonment. He was detained at Lubyanka prison. Struggling with deteriorating health, he was released in 1964 in exchange for the Soviet spy Konon Molody. Early life Wynne was born in Shropshire, England, and raised in Ystrad Mynach, South Wales. His father was a foreman in an engineering workshop. He struggled with dyslexia and left school at 14 to work for an electrical contractor. He then worked at a telephone factory as an apprentice. After the Second World War, he traded in electrical equipment, travelling often through Europe and India. Wynne married Sheila Beaton in 1946; the couple had a son, Andrew, born in 1952. His business extended into Eastern Bloc countries from 1955. MI6 and later life In November 1960, Wynne was recruited by MI6 and asked to make a sales trip to Moscow, where he made contact with Oleg Penkovsky, a high-ranking GRU officer. Penkovsky had made earlier offers to spy for the West. Wynne later became an intermediary and courier for Penkovsky, smuggling top-secret Soviet intelligence to London on return from his frequent trips to the USSR. Wynne's and Penkovsky's espionage activities were discovered by the KGB. Both men were arrested in November 1962, around the time of the Cuban Missile Crisis. Wynne and Penkovsky each pleaded guilty on 7 May 1963 and were sentenced four days later. Wynne was sentenced to eight years in prison. Penkovsky was sentenced to death and executed by firing squad, though Wynne believed he died by suicide in prison. Wynne was held at the Lubyanka. In April 1964, amid British concerns for his deteriorating health, Wynne was released in exchange for the Soviet spy Konon Molody (also known as Gordon Lonsdale). After his release, Wynne returned to his business career. He and his wife Sheila divorced, and Wynne became estranged from his son and only child, Andrew. In 1970 Wynne