Oleg Adolfovich Lyalin (Russian: Олег Адольфович Лялин; 24 June 1937[1] – 12 February 1995) was a Soviet agent who defected from the KGB.
His defection came about after he was arrested in London by policeman Charles Shearer for drunk driving in the early morning of 31 August 1971.
His bail of £50 was paid by the Soviet Trade Delegation but he was taken to a safe house by MI5 and his drunk driving-case was eventually dropped as he decided to defect.
[3] He offered to disclose information about KGB activities in exchange for a new life with his (Russian) secretary, Irina Teplyakova, with whom he had begun an affair and took political asylum in August 1972.
[4] Lyalin later revealed that his mission was to spy across the Midlands while posing as a textile buyer, and that there was a plan to infiltrate agents disguised as official messengers into Whitehall's tunnel systems to distribute poison gas capsules.