His Majesty's Home Civil Service, also known as His Majesty's Civil Service, the Home Civil Service, or colloquially as the Civil Service, is the permanent bureaucracy or secretariat of Crown employees that supports His Majesty's Government, which is led by a cabinet of ministers chosen by the prime minister of the United Kingdom of Great Britain and Northern Ireland.
A cabinet secretary is usually a senior official who provides services and advice to a cabinet of ministers as part of the Cabinet Office. In many countries, the position can have considerably wider functions and powers, including general responsibility for the entire civil service.
Sir Matthew John Rycroft is a British civil servant and diplomat serving as Permanent Under-Secretary of State at the Home Office since 2020, appointed following the resignation of Sir Philip Rutnam. Rycroft previously served as Permanent Secretary at the Department for International Development (DFID) from 2018 to 2020 and as the Permanent Representative to the United Nations in New York from 2015 to 2018.
Augustine Thomas O'Donnell, Baron O'Donnell, is a former British senior civil servant and economist, who between 2005 and 2011 served as the Cabinet Secretary, the highest official in the British Civil Service.
Sir Mark Ivan Rogers is a former senior British civil servant who was the Permanent Representative of the United Kingdom to the European Union from 4 November 2013 until his resignation on 3 January 2017.
The Principal Private Secretary to the Prime Minister of the United Kingdom is a senior official in the United Kingdom Civil Service who acts as principal private secretary to the prime minister of the United Kingdom. The holder of this office is traditionally the head of the Prime Minister's Office in 10 Downing Street. In the Civil Service, the role is currently graded as director general.
David George Hamilton Frost, Baron Frost is a former British diplomat, civil servant and politician who served as a Minister of State at the Cabinet Office between March and December 2021. Frost was Chief Negotiator of Task Force Europe from January 2020 until his resignation in December 2021.
Sir Mark Justin Lyall Grant, is a former senior British diplomat who was previously the United Kingdom's National Security Adviser and Permanent Representative of the United Kingdom to the United Nations.
Jeremy John Heywood, Baron Heywood of Whitehall, was a British civil servant who served as Cabinet Secretary to David Cameron and Theresa May from 2012 to 2018 and Head of the Home Civil Service from 2014 to 2018. He served as the Principal Private Secretary to Prime Ministers Tony Blair and Gordon Brown from 1999 to 2003 and 2008 to 2010. He also served as Downing Street Chief of Staff and the first Downing Street Permanent Secretary. After he was diagnosed with lung cancer, he took a leave of absence from June 2018, and retired on health grounds on 24 October 2018, receiving a life peerage; he died a fortnight later on 4 November 2018.
The National Security Council is a United Kingdom cabinet committee. The Council's terms of reference were said in September 2022 to include matters relating to national security, foreign policy, defence, trade, international relations, development, resilience and resource security.
The National Security Adviser (NSA) is a senior official in the Cabinet Office, based in Whitehall, who serves as the principal adviser to the Prime Minister of the United Kingdom and Cabinet of the United Kingdom on all national security issues. The NSA post was created in May 2010 as part of the reforms that also saw the creation of the National Security Council. There have been six holders of the office to date, of whom two served more than three years in the post.
Sir Simon Lawrance Gass is a British civil servant. He chaired the Joint Intelligence Committee from 2019 to 2023 and served as the British Prime Minister's representative on Afghanistan from 2021 to 2022 concurrently. Between 2018 and 2019, he was the Commandant of the Royal College of Defence Studies. During his diplomatic career, he served as British ambassador to Greece and to Iran. In May 2023, it was announced he was stepping down as Chairman of the Joint Intelligence Committee and succeeded by Madeleine Alessandri.
Sir Martin Eugene Donnelly, is a British former civil servant. He was Permanent Secretary of the Department for International Trade, until leaving the Civil Service on 24 March 2017.
The Cabinet Secretary is the most senior civil servant in the United Kingdom and is based in the Cabinet Office. The person in this role acts as the senior policy adviser to the Prime Minister and Cabinet, and as the Secretary to the Cabinet is responsible to all ministers for the efficient running of government. The role is currently occupied by Simon Case.
Sir Oliver Robbins is a former senior British civil servant who served as the Prime Minister's Europe Adviser and the chief Brexit negotiator from 2017 to 2019. He was a controversial figure among Brexit supporters for his perceived pro-European stance. He previously served as the Permanent Secretary at the Department for Exiting the European Union from July 2016 to September 2017, and as the Prime Minister's Advisor on Europe and Global Issues from June 2016 to July 2016. Since 2019, he has been an investment advisor at Goldman Sachs.
Sir Philip McDougall Rutnam, is a British former civil servant who served as Permanent Under-Secretary of State at the Home Office from 2017 until his resignation on 29 February 2020. Prior to this, he was the Permanent Secretary at the Department for Transport for five years and also Acting Permanent Secretary at the Department for Business, Innovation and Skills in 2010.
David Quarrey is a British diplomat and the British Ambassador to NATO since 2022. He was formerly acting National Security Adviser, having taken over the role while David Frost continued as the United Kingdom's Chief Negotiator to the European Union during the Brexit negotiations. He was the UK's Ambassador to Israel from 2015 to 2019.
Simon Case is a British civil servant who is the current Cabinet Secretary and Head of the Home Civil Service since 9 September 2020, succeeding Sir Mark Sedwill.
Peter Thomas Marshall Hill is a British civil servant and a former political advisor. He was appointed CEO of the 26th United Nations Climate Change Conference of the Parties (COP26) in September 2019, having previously been Principal Private Secretary to the Prime Minister.
The Economic and Domestic Affairs Secretariat (EDS) is a secretariat in the United Kingdom Cabinet Office.
