This is a list of 2005 British incumbents.

• Monarch
  • Head of State – Elizabeth II, Queen of the United Kingdom (1952–2022)
• Prime Minister
  • Head of Government – Tony Blair, Prime Minister of the United Kingdom, First Lord of the Treasury and Minister for the Civil Service (1997–2007)
• Deputy Prime Minister
  • Deputy Head of Government – John Prescott, Deputy Prime Minister of the United Kingdom and First Secretary of State (1997–2007)
• Chancellor of the Exchequer
  • Head of the Treasury – Gordon Brown, Chancellor of the Exchequer and Second Lord of the Treasury (1997–2007)
• Foreign Secretary
  • Jack Straw, Secretary of State for Foreign and Commonwealth Affairs (2001–2007)
• Secretary of State for the Home Department
  • Charles Clarke, Secretary of State for the Home Department (2004–2007)
• Secretary of State for Environment, Food and Rural Affairs
  • Margaret Beckett, Secretary of State for Environment, Food and Rural Affairs (2001–2007)
• Secretary of State for Transport
  • Alistair Darling, Secretary of State for Transport (2002–2007)
• Secretary of State for Scotland
  • Alistair Darling, Secretary of State for Scotland (2003–2007)
• Secretary of State for Health
  1. John Reid, Secretary of State for Health (2003–2005)
  2. Patricia Hewitt, Secretary of State for Health (2005–2007)
• Secretary of State for Northern Ireland
  • Peter Hain, Secretary of State for Northern Ireland (2002–2007)
• Secretary of State for Defence
  • John Reid, Secretary of State for Defence (1999–2007)
• Secretary of State for Trade and Industry
  • Patricia Hewitt, Secretary of State for Trade and Industry (2001–2007)
• Minister for Women and Equality
  • Patricia Hewitt, Minister for Women and Equality (2001–2007)
• Secretary of State for Culture, Media and Sport
  • Tessa Jowell, Secretary of State for Culture, Media and Sport (2005–2007)
• Secretary of State for Education and Skills
  • Ruth Kelly, Secretary of State for Education and Skills (2002–2007)
• Secretary of State for Wales
  • Secretary of State for Wales (2005–2007)
• Leader of the House of Commons
  • Peter Hain, Leader of the House of Commons and Lord Privy Seal (2003–2007)
• Leader of the House of Lords
  • Baroness Amos, Leader of the House of Lords and Lord President of the Council (2003–2007)
• Secretary of State for Constitutional Affairs
  • Charles Falconer, Baron Falconer of Thoroton, Secretary of State for Constitutional Affairs and Lord Chancellor (2003–2007)
• Secretary of State for International Development
  • Hilary Benn, Secretary of State for International Development (2003–2007)
• Secretary of State for Work and Pensions
  • Alan Johnson, Secretary of State for Work and Pensions (2004–2007)
• Chancellor of the Duchy of Lancaster
  • Alan Milburn, Chancellor of the Duchy of Lancaster (2004–2007)
• First Minister of Scotland
  • Jack McConnell, First Minister of Scotland (2001–2007)
• Deputy First Minister of Scotland
  • Jim Wallace then Nicol Stephen
• First Minister of Wales
  • Rhodri Morgan

• Archbishop of Canterbury
  • Rowan Williams, Archbishop of Canterbury (2003–2012)
• Archbishop of York
  1. David Hope, Archbishop of York (1995–2005; retired 28 February)
  2. John Sentamu, Archbishop of York (2005–present; installed 10 May)

• Prince consort
  • The Duke of Edinburgh (m. 1947)
• Heir apparent
  • The Prince of Wales (1958–present)