John Allen Clark

Sir John Allen Clark (14 February 1926 – 3 December 2001) was managing director of the British Plessey Company, an electronics and telecommunications group built up by his father, Allen George Clark. His career with Plessey was dominated by a battle with Arnold Weinstock of GEC for control of the company together with English Electric from the 1960s. This culminated in the late 1980s with the takeover and break-up of Plessey.