Prime Minister of Great Britain

Prime Minister of Great Britain
Incumbent Thomas Carew since 27 August 2024
His Majesty's Government
Style	The Right Honourable
Type	Head of Government
Member of	Cabinet Privy Council Regional Defence Council Whitehall Foreign Affairs Council Air Force Board
Residence	10 Downing Street
Appointer	The Sovereign
Constituting instrument	Executive Act 2024
Formation	12th of October 2018
First holder	Colfax County
Deputy	Deputy Prime Minister First Secretary of State
Salary	£15,000 per cycle (July 2024)
Website	10 Downing Street

The Prime Minister of Great Britain is the Head of Government of the Empire of Great Britain. The Prime Minister advises the Sovereign on the exercise of much of the royal prerogative, chairs the Cabinet and selects its ministers. As modern Prime Ministers hold office by virtue of their ability to command the confidence of the House of Commons, they tend to sit as a Member of Parliament. It is the most senior of the Great Offices of State.

The Office of Prime Minister was not originally established by any statute or constitutional document and existed only by long-established convention, whereby the Sovereign appoints as Prime Minister at their pleasure. However, since the Reign of William V, the office was established by law and the Sovereign appointed the Prime Minister by those procedures. In practice, the office is held by the leader of the political party that holds the majority of seats in the Commons.

The Prime Minister also holds the position of First Lord of the Treasury, as well as a member of various councils and boards to represent the interests of His Majesty's Government. Their official residence and office is 10 Downing Street in London.

The longest-serving Prime Minister per overall terms is Prince Victor, Duke of York, who served for 409 days across four terms. He also holds the record for longest single term, recording 231 days consecutively as Prime Minister. The longest-serving Prime Minister to be elected to the position is James Forsyte, The Duke of Warwick, who served for 133 days. The shortest tenure as Prime Minister is also held by James Forsyte, who served 14 days as Prime Minister during June and July of 2022. The first female Prime Minister was Serafina Sherwood, 1st Duchess of Manitoba: three further female Prime Ministers have since served: Elizabeth Howard-Campbell, 1st Duchess of Edinburgh, Kathrine Grey, The Countess of Argyll, and Josephine Carew-Grey, The Baroness Wilton.

Thomas Carew, The Viscount Sidmouth has held the office since 27 August 2024.

Prime Ministers of Great Britain

Portrait		Prime Minister	Term of Office			Mandate	Party	Government
			Start	End	Duration
​		Colfax County MP x	12 October 2018	1 February 2019	113 days	Appointed	Independent	Colfax County Premiership
​		Victor Newton MP x	1 February 2019	15 February 2019	15 days	Appointed	Independent	1st Newton Premiership
​		Fabian Hardie MP x	15 February 2019	3 June 2019	109 days	Appointed	Independent	Hardie Premiership
​		Victor Newton MP x	3 June 2019	19 January 2020	231 days	Appointed	Independent	2nd Newton Premiership
​		Corneliu Flint MP x	19 January 2020	28 March 2020	70 days	Appointed	Independent	Flint Premiership
​		Oliver Newman PC MP x	28 March 2020	14 August 2020	140 days	Appointed	Centre	Newman Premiership
​		Sir James Stephenson MP for Brecon and Radnorshire	14 August 2020	18 September 2020	36 days	Appointed Aug. 2020 Election	British Workers'	Stephenson Premiership
​		Cameron Hanover The Baron Lomond MP for Dublin University UC	18 September 2020	23 October 2020	36 days	Sep. 2020 Election	National Progressive Coalition	1st Lomond Premiership
​		Philip Ross MP for Melbourne Ports	23 October 2020	8 November 2020	17 days	Appointed	National Progressive Coalition	Ross Premiership
​		Victor Hanover The Earl of Pembroke MP for York Central	8 November 2020	12 January 2021	66 days	Nov. 2020 Election	BWP-Ind Coalition	Pembroke Premiership
​		Sir Harold Macmillan MP for Bromley	12 January 2021	14 March 2021	62 days	Jan. 2021 Election	Conservative	Macmillan Premiership
​		Sir Angus Somerset MP for Sevenoaks	14 March 2021	20 June 2021	99 days	Mar. 2021 Election Apr. 2021 Election	British Workers'	A. Somerset Premiership
​		James Sherwood-Somerset The Viscount Spencer MP for York Central	20 June 2021	30 October 2021	133 days	Jun. 2021 Election Aug. 2021 Election	Liberal Democrats	Spencer Premiership
​		Kalara Sherwood-Somerset The Duchess of Manitoba MP for Vancouver Centre	30 October 2021	17 January 2022	80 days	Oct. 2021 Election Dec. 2021 Election	SDLP-BWP Coalition	Manitoba Premiership
​		Victor Somerset The Marquess of Grey MP for York Central	17 January 2022	23 April 2022	97 days	???	British Workers'	Grey Premiership
​		Sirch Sherwood-Somerset The 2nd Baron Hastings MP for Vancouver Centre	23 April 2022	26 June 2022	65 days	Apr. 2022 Election	British Workers'	Hastings Premiership
​		James Somerset The Earl of Northumberland MP for York Central	26 June 2022	9 July 2022	14 days	Jun. 2022 Election	British Workers'	Northumberland Premiership
​		Charles Somerset The Baron Huntingdon MP for Cambridge	9 July 2022	9 August 2022	32 days	Appointed	British Workers'	Huntingdon Premiership
​		Joshua Sherwood MP for Prince Edward Island	15 August 2022	7 October 2022	54 days	Aug. 2022 Election	British Workers'	J. Sherwood Premiership
​		Matthew Somerset The Duke of Somerset MP for Glasgow Central	7 October 2022	7 December 2022	62 days	Oct. 2022 Election	British Royalist	1st Somerset Premiership
​		Cameron Romefeller The Baroness Lomond MP for West Dunbartonshire	7 December 2022	31 January 2023	56 days	Dec. 2022 Election	British Federation of Labour	2nd Lomond Premiership
​		Elio Somerset The 1st Baron Exeter MP for Exeter	31 January 2023	5 April 2023	65 days	Jan. 2023 Election	Liberal Progressive	Exeter Premiership
​		Matthew Somerset The Duke of Somerset MP for Glasgow Central	5 April 2023	24 May 2023	50 days	Apr. 2023 Election	Unity Coalition	2nd Somerset Premiership
​		Elizabeth Howard-Campbell The 1st Duchess of Edinburgh MP for St. James	24 May 2023	27 July 2023	65 days	May 2023 Election	British Constitutionalist	Edinburgh Premiership
​		Cameron Romefeller The Viscountess Balloch MP for West Dunbartonshire	27 July 2023	20 September 2023	56 days	July 2023 Election	British Constitutionalist	Balloch Premiership
​		August Lleyton The Earl of Stirling MP for Stirling	21 September 2023	20 November 2023	61 days	Sept. 2023 Election	Heron	Stirling Premiership
​		William Somerset The 2nd Viscount Douglas MP for Kensington	21 November 2023	5 March 2024	106 days	Nov. 2023 Election Jan. 2024 Election	Heron	Douglas Premiership
​		Thomas Carew The Baron Knightstone MP for East Devon	5 March 2024	1 July 2024	119 days	Mar. 2024 Election May 2024 Election	Heron-BLP Coalition (March - May) Unionist (May - July)	Knightstone Premiership
​
​		Josephine Carew-Grey The Baroness Wilton MP for Tavistock	1 July 2024	2 August 2024	33 days	July 2024 Election	Unionist-British Workers' Coalition	Wilton Premiership
​		James Forsyte The Duke of Warwick MP for York Central	2 August 2024	27 August 2024	23 days	Appointed	Unionist-British Workers' Coalition	Warwick Premiership
​		Thomas Carew The Viscount Sidmouth MP for East Devon	27 August 2024	Present	24 days	(August 2024 Election)	National Government	Sidmouth Premiership