John Guinness
Sir John Ralph Sidney Guinness CBE (23 December 1935 – 27 July 2020) was a British civil servant and businessman.
Guinness was a member of HM Diplomatic Service and had worked in the Cabinet Office and was Permanent Secretary of the Department of Energy.[1] from 1991 to 1992 and Chairman of British Nuclear Fuels Ltd from 1992 to 1993.
He died on 27 July 2020.[2]