Prime Minister of the United Kingdom

Royal Arms of Her Majesty's Government

Flag of the United Kingdom

The **prime minister of the United Kingdom** is the head of government in the United Kingdom. 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 sit as a member of Parliament.

The office of prime minister is not established by any statute or constitutional document, but exists only by long-established convention, whereby the reigning monarch appoints as prime minister the person most likely to command the confidence of the House of Commons; this individual is typically the leader of the political party or coalition of parties that holds the largest number of seats in that chamber. It was announced by Prime Minister Boris Johnson on 31st January 2022 that the office of Prime Minister would be formally established.

The prime minister is *ex officio* also First Lord of the Treasury, Minister for the Civil Service and the minister responsible for national security. Indeed, certain privileges, such as residency of 10 Downing Street, are accorded to prime ministers by virtue of their position as First Lord of the Treasury. In 2019, the office of Minister for the Union was established; Boris Johnson became the first prime minister to hold this title.

Rishi Sunak has been Prime Minister since 25th October 2022, after replacing Liz Truss as Leader of the Conservative Party

## History

The position of prime minister was not created; it evolved slowly and organically over three hundred years due to numerous Acts of Parliament, political developments, and accidents of history. The office is therefore best understood from a historical perspective. The origins of the position are found in constitutional changes that occurred during the Revolutionary Settlement (1688–1720) and the resulting shift of political power from the Sovereign to Parliament. Although the sovereign was not stripped of their ancient prerogative powers and legally remained the head of government, politically it gradually became necessary for him or her to govern through a prime minister who could command a majority in Parliament.

By the 1830s, the Westminster system of government (or cabinet government) had emerged; the prime minister had become *primus inter pares* or the first among equals in the Cabinet and the head of government in the United Kingdom. The political position of prime minister was enhanced by the development of modern political parties, the introduction of mass communication and photography. By the start of the 20th century the modern premiership had emerged; the office had become the pre-eminent position in the constitutional hierarchy in relation to the Sovereign, Parliament and Cabinet.

Before 1902, the prime minister sometimes sat in the House of Lords, provided that his government could form a majority in the Commons. However, as the power of the aristocracy waned during the 19th century the convention developed that the prime minister should always sit as a Member of Parliament in the lower house, making them answerable only to the Commons in Parliament. The prime minister's authority was further enhanced by the Parliament Act 1911 which marginalised the influence of the House of Lords in the law-making process.

## Authority, powers and constraints

The prime minister is the head of the United Kingdom government. As such, the modern prime minister leads the Cabinet (the Executive). In addition, the prime minister leads a major political party and generally commands a majority in the House of Commons (the lower chamber of Parliament). The incumbent wields both significant legislative and executive powers. Under the British system, there is a unity of powers rather than separation.

In the House of Commons, the prime minister guides the law-making process with the goal of enacting the legislative agenda of their political party. In an executive capacity, the prime minister appoints (and may dismiss) all other Cabinet members and ministers, and co-ordinates the policies and activities of all government departments, and the staff of the Civil Service. The prime minister also acts as the public "face" and "voice" of Her Majesty's Government, both at home and abroad. Solely upon the advice of the prime minister, the Sovereign exercises many statutory and prerogative powers, including high judicial, political, official and Church of England ecclesiastical appointments; the conferral of peerages and some knighthoods, decorations and other important honours.

## Constitutional background

The British system of government is based on an uncodified constitution, meaning that it is not set out in any single document. The British constitution consists of many documents and most importantly for the evolution of the office of the prime minister, it is based on customs known as constitutional conventions that became accepted practice. In 1928, Prime Minister H. H. Asquith described this characteristic of the British constitution in his memoirs:

> In this country we live ... under an unwritten Constitution. It is true that we have on the Statute-book great instruments like Magna Carta, the Petition of Right, and the Bill of Rights which define and secure many of our rights and privileges; but the great bulk of our constitutional liberties and ... our constitutional practices do not derive their validity and sanction from any Bill which has received the formal assent of the King, Lords and Commons. They rest on usage, custom, convention, often of slow growth in their early stages, not always uniform, but which in the course of time received universal observance and respect.
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The relationships between the prime minister and the sovereign, Parliament and Cabinet are defined largely by these unwritten conventions of the constitution. Many of the prime minister's executive and legislative powers are actually royal prerogatives which are still formally vested in the sovereign, who remains the head of state. Despite its growing dominance in the constitutional hierarchy, the premiership was given little formal recognition until the 20th century; the legal fiction was maintained that the sovereign still governed directly. The position was first mentioned in statute only in 1917, in the schedule of the Chequers Estate Act. Increasingly during the 20th century, the office and role of prime minister featured in statute law and official documents; however, the prime minister's powers and relationships with other institutions still largely continue to derive from ancient royal prerogatives and historic and modern constitutional conventions. Prime ministers continue to hold the position of First Lord of the Treasury and, since November 1968, that of Minister for the Civil Service, the latter giving them authority over the civil service.

Under this arrangement, Britain might appear to have two executives: the prime minister and the sovereign. The concept of "the Crown" resolves this paradox.[14] The Crown symbolises the state's authority to govern: to make laws and execute them, impose taxes and collect them, declare war and make peace. Before the "Glorious Revolution" of 1688, the sovereign exclusively wielded the powers of the Crown; afterwards, Parliament gradually forced monarchs to assume a neutral political position. Parliament has effectively dispersed the powers of the Crown, entrusting its authority to responsible ministers (the prime minister and Cabinet), accountable for their policies and actions to Parliament, in particular the elected House of Commons.

Although many of the sovereign's prerogative powers are still legally intact, constitutional conventions have removed the monarch from day-to-day governance, with ministers exercising the royal prerogatives, leaving the monarch in practice with three constitutional rights: to be kept informed, to advise and to warn.

## Modern premiership

### Appointment

In modern times, much of the process involving prime ministerial appointments is informally governed by constitutional conventions and authoritative sources, like The Cabinet Manual, paragraphs 2.7 to 2.20 and 3.1 to 3.2.

The prime minister is appointed by the monarch, through the exercise of the royal prerogative. In the past, the monarch has used personal choice to dismiss or appoint a prime minister (the last time being in 1834), but it is now the case that they should not be drawn into party politics.

The prime minister "...holds that position by virtue of his or her ability to command the confidence of the House of Commons, which in turn commands the confidence of the electorate, as expressed through a general election." By convention, the prime minister is also an MP and is normally the leader of the political party that commands a majority in the House of Commons.

### Prime Minister's Office

The Prime Minister's Office helps the prime minister to 'establish and deliver the government's overall strategy and policy priorities, and to communicate the government's policies to Parliament, the public and international audiences'. The Prime Minister's Office is formally part of the Cabinet Office, but the boundary between its work and that of the wider Cabinet Office can be unclear; the wider Cabinet Office might carry out very similar work. Peter Hennessy has claimed that this overall arrangement means there is in fact effectively a Prime Minister's Department, though it is not called this.

### Prime Minister's Questions

Prime Minister's Questions (PMQ's) is a constitutional convention, currently held as a single session every Wednesday at noon when the House of Commons is sitting, in which the prime minister answers questions from members of Parliament (MPs). The leader of the opposition usually asks the prime minister six questions, and the leader of the third-largest parliamentary party can ask two questions. It is an occasion when the prime minister appears regularly on live television and radio.

The prime minister also appears before the Liaison Committee to answer questions about public policy.

### Security and transport

The personal protection of the prime minister and former prime ministers is the responsibility of Protection Command within the Metropolitan Police Service. The fleet of Prime Ministerial Cars provides the prime minister with a number of security features as well as transport. The vehicles are driven by officers from this unit. Air transport for the prime minister is provided by a variety of military and civilian operators.

### International role

One of the roles of the prime minister is to represent the UK at home and abroad, for example at the annual G7 Summit. The prime minister makes many international trips. According to Gus O'Donnell, the number of overseas visits for the prime minister has gone up.

### Deputy

Dominic Raab was the First Secretary of State from 2019 to 2021 and then deputy prime minister from 2021 onwards. He deputised for Boris Johnson when he was ill with COVID-19 in April 2020.

The prime minister's second-in-command has variably served as deputy prime minister, first secretary of state and *de facto* deputy and at other times prime ministers have chosen not to select a permanent deputy at all, preferring *ad hoc* arrangements.

#### Succession

Nobody has the right of automatic succession to the prime ministership. However, it is generally considered by those with an interest in the matter that in the event of the death of the prime minister, it would be appropriate to appoint an interim prime minister, though there is some debate as to how to decide who this should be.

According to Rodney Brazier, there are no procedures within government to cope with the sudden death of the prime minister. There is also no such title as acting prime minister of the United Kingdom. Despite refusing "...to discuss a hypothetical situation" with BBC News in 2011, the Cabinet Office is said to have said in 2006:

> There is no single protocol setting out all of the possible implications. However, the general constitutional position is as set out below. There can be no automatic assumption about who The Queen would ask to act as caretaker Prime Minister in the event of the death of the Prime Minister. The decision is for her under the Royal Prerogative. However, there are some key guiding principles. The Queen would probably be looking for a very senior member of the Government (not necessarily a commons minister since this would be a short-term appointment). If there was a recognised deputy to the Prime Minister, used to acting on his behalf in his absences, this could be an important factor. Also important would be the question of who was likely to be in contention to take over long-term as Prime Minister. If the most senior member of the Government was him or herself a contender for the role of Prime Minister, it might be that The Queen would invite a slightly less senior non-contender. In these circumstances, her private secretary would probably take soundings, via the Cabinet Secretary, of members of the Cabinet, to ensure that The Queen invited someone who would be acceptable to the Cabinet to act as their chair during the caretaker period. Once the Party had elected a new leader, that person would, of course, be invited to take over as Prime Minister.
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### Resignation

A prime minister ends their tenure by offering their resignation to His Majesty. This can happen after their party has suffered a general election defeat, so that they no longer command the confidence of the House of Commons. It can also happen mid-term, if they are forced to resign for political reasons, or for other reasons such as ill-health. If the prime minister resigns mid-term, and their party has a majority in the Commons, the party selects a new leader according to its rules, and this new leader is invited by the monarch to become the new prime minister. The outgoing prime minister is likely to remain in post until the new leader has been chosen by the party. After resigning, the outgoing prime minister remains a Member of Parliament. An outgoing prime minister can ask the monarch to bestow honours on any number of people of their choosing, known as the Prime Minister's Resignation Honours. No incumbent prime minister has ever lost their own seat at a general election. Only one prime minister has been assassinated.