Ian Fells, CBE,FREng,FRSE (5 September 1932 – 20 August 2025) was a British energy conversion expert and academic. He was Professor of Energy Conversion at the University of Newcastle upon Tyne, and chairman of the "New and Renewable Energy Centre" at Blyth, Northumberland, England.
Fells was a long-standing advocate of nuclear power.[4] As of 2008, Fells was of the view that "any notion that renewables can provide for all our [energy] requirements is a mischievous and reckless boast".[5]
Fells made over 500 television and radio programmes, including the TV popular science series Take Nobody's Word For It with Carol Vorderman, and regularly appeared as guest expert and judge on The Great Egg Race from 1979 to 1986.[6][7]
In 2012 he joined Newcastle-based company, Penultimate Power UK, as the Technical Director to develop small modular reactors.[4][9]
His first wife Hazel, a mathematician, passed away in 2017. They had four sons, all engineers.[10][11] In 2018 he married Candida Whitmill, the Managing Director of Penultimate Power UK.
Fells died after a long illness on 20 August 2025, at the age of 92.[1]