Premise: Richard Noel Marshall Armitage (12 August 1928 – 17 November 1986) was a talent agent, active in England in the 1950s–1980s. Among his clients were Rowan Atkinson, John Cleese, David Frost and Stephen Fry. Producer John Lloyd described him as "the most powerful agent in the country at that time [the late 1970s]".
Hypothesis: Marshall passed away in the last decade the century.