Thomas Alan Margerison (13 November 1923 – 25 February 2014) was a British science journalist, author, and broadcaster who founded the magazine New Scientist in 1956.^[1] He was a science correspondent for The Sunday Times, which he joined in 1961.^[1]

This article relies largely or entirely on a single source. (March 2022)

Margerison partnered David Frost to form what became London Weekend Television (LWT), a new ITV contractor from August 1968.^[2] He was LWT's first deputy managing director, becoming both chairman and chief executive of the company within two years.^[1] Margerison left LWT in 1971.^[1] He served as the chairman of Computer Technology Limited from 1971 to 1975.^[1]

Margerison died on 25 February 2014, aged 90.^[1] He was survived by his partner, journalist Marjorie Wallace, with whom he had lived since the mid-1980s, by their daughter, Sophia Margerison, and by Peter and Angus, his two sons by his ex-wife Pamela Margerison (née Tilbrook).^[1] His ashes are buried on the east side of Highgate Cemetery.