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Mark Philip Sedwill, Baron Sedwill, GCMG, FRGS, PC (born 21 October 1964) is a British diplomat and senior civil servant who served as Cabinet Secretary and Head of the Home Civil Service to Prime Ministers Theresa May and Boris Johnson from 2018 to 2020.
Sir Mark Sedwill was Cabinet Secretary and National Security Advisor from 2017 to 2020. He has served in various roles in the UK government, including Afghanistan, NATO and the Home Office.
Jun 28, 2020 · Sir Mark Sedwill, who advised Boris Johnson on policy and the conduct of government, will leave his post in September. His departure follows reports of tensions with Downing Street officials and a reshuffle of the civil service.
Jun 28, 2020 · Sir Mark took over as cabinet secretary in November 2018, following the death from cancer of Sir Jeremy Heyward - having filled in for him previously while he was receiving treatment.
Nov 8, 2023 · The former head of the civil service, Lord Mark Sedwill, will give evidence to the COVID Inquiry today, after claims surfaced that he wanted people to hold "chicken pox parties" to promote herd immunity at the start of the pandemic.
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Jun 28, 2020 · Less than a year ago, a smiling Sir Mark Sedwill welcomed Boris Johnson to Downing Street after he became prime minister. Now, it is Sir Mark's turn to signal his exit from No 10.
Jun 29, 2020 · Who is Mark Sedwill? Sedwill has served as national security adviser to the PM since 2017 and took over as cabinet secretary following the sudden death of Jeremy Heywood in November...
