The dramatic ending to the Iranian embassy siege in Kensington, central London, is celebrated as a feat of SAS heroism. During the six day long ordeal, the captive PC Trevor Lock also demonstrated extraordinary levels of coolness and ingenuity.
Lock, who has died aged 85, was the officer on duty on 30 April 1980 when six Iraqi-backed gunmen demanding autonomy for the oil-rich Khuzestan province squeezed off a burst of automatic fire and forced their way into the building.