Politics of the United Kingdom

The monarch appoints a Prime Minister as the head of Her Majesty's Government in the United Kingdom, guided by the strict convention that the Prime Minister should be the member of the House of Commons most likely to be able to form a Government with the support of that House. In practice, this means that the leader of the political party with an absolute majority of seats in the House of Commons is chosen to be the Prime Minister. If no party has an absolute majority, the leader of the largest party is given the first opportunity to form a coalition. The Prime Minister then selects the other Ministers which make up the Government and act as political heads of the various Government Departments. About twenty of the most senior government ministers make up the Cabinet and approximately 100 ministers in total comprise the government. In accordance with constitutional convention, all ministers within the government are either Members of Parliament or peers in the House of Lords.

As in some other parliamentary systems of government (especially those based upon the Westminster System), the executive (called "the government") is drawn from and is answerable to Parliament - a successful vote of no confidence will force the government either to resign or to seek a parliamentary dissolution and a general election. In practice, members of parliament of all major parties are strictly controlled by whips who try to ensure they vote according to party policy. If the government has a large majority, then they are very unlikely to lose enough votes to be unable to pass legislation.

The Prime Minister is the most senior minister in the Cabinet. They are responsible for chairing Cabinet meetings, selecting Cabinet ministers (and all other positions in Her Majesty's government), and formulating government policy. The Prime Minister being the de facto leader of the UK, he or she exercises executive functions that are nominally vested in the sovereign (by way of the Royal Prerogatives). Historically, the British monarch was the sole source of executive powers in the government. However, following the lead of the Hanoverian monarchs, an arrangement of a "Prime Minister" chairing and leading the Cabinet began to emerge. Over time, this arrangement became the effective executive branch of government, as it assumed the day-to-day functioning of the British government away from the sovereign.

Theoretically, the Prime Minister is primus inter pares (i.e., Latin for "first among equals") among their Cabinet colleagues. While the Prime Minister is the senior Cabinet Minister, they are theoretically bound to make executive decisions in a collective fashion with the other Cabinet ministers. The Cabinet, along with the PM, consists of Secretaries of State from the various government departments, the Lord High Chancellor of Great Britain, the Lord Privy Seal, the President of the Board of Trade, the Chancellor of the Duchy of Lancaster and Ministers without portfolio. Cabinet meetings are typically held weekly, while Parliament is in session.

The Government of the United Kingdom contains a number of ministries known mainly, though not exclusively as departments, e.g., Department for Education. These are politically led by a Government Minister who is often a Secretary of State and member of the Cabinet. He or she may also be supported by a number of junior Ministers. In practice, several government departments and Ministers have responsibilities that cover England alone, with devolved bodies having responsibility for Scotland, Wales and Northern Ireland, (for example - the Department of Health), or responsibilities that mainly focus on England (such as the Department for Education).

Implementation of the Minister's decisions is carried out by a permanent politically neutral organisation known as the civil service. Its constitutional role is to support the Government of the day regardless of which political party is in power. Unlike some other democracies, senior civil servants remain in post upon a change of Government. Administrative management of the Department is led by a head civil servant known in most Departments as a Permanent Secretary. The majority of the civil service staff in fact work in executive agencies, which are separate operational organisations reporting to Departments of State.

"Whitehall" is often used as a metonym for the central core of the Civil Service. This is because most Government Departments have headquarters in and around the former Royal Palace Whitehall.

The Scottish Government is responsible for all issues that are not explicitly reserved to the United Kingdom Parliament at Westminster, by the Scotland Act; including NHS Scotland, education, justice, rural affairs, and transport. It manages an annual budget of more than £25 billion.[5] The government is led by the First Minister, assisted by various Ministers with individual portfolios and remits. The Scottish Parliament nominates a Member to be appointed as First Minister by the Queen. The First Minister then appoints their Ministers (now known as Cabinet Secretaries) and junior Ministers, subject to approval by the Parliament. The First Minister, the Ministers (but not junior ministers), the Lord Advocate and Solicitor General are the Members of the 'Scottish Executive', as set out in the Scotland Act 1998. They are collectively known as "the Scottish Ministers".

The Welsh Government and the National Assembly for Wales have more limited powers than those devolved to Scotland,[6] although following the passing of the Government of Wales Act 2006 and the 2011 Welsh devolution referendum, the Assembly can now legislate in some areas through an Act of the National Assembly for Wales. Following the 2011 election, Welsh Labour held exactly half of the seats in the Assembly, falling just short of an overall majority. A Welsh Labour Government was subsequently formed headed by Carwyn Jones.

The Northern Ireland Executive and Assembly have powers closer to those already devolved to Scotland. The Northern Ireland Executive is led by a diarchy, most recently First Minister Arlene Foster (Democratic Unionist Party) and deputy First Minister Martin McGuinness (Sinn Féin). The two positions are currently vacant and there has been no Executive since January 2017 because of the Renewable Heat Incentive scandal and the failure to form a government following the Assembly's snap election in March 2017.[7]

Parliament meets at the Palace of Westminster

The Countries of the United Kingdom are divided into parliamentary constituencies of broadly equal population by the four Boundary Commissions. Each constituency elects a Member of Parliament (MP) to the House of Commons at general elections and, if required, at by-elections. As of 2010 there are 650 constituencies (there were 646 before that year's general election). At the 2017 general election, of the 650 MPs, all but one - Lady Sylvia Hermon - were elected as representatives of a political party. However, as of 2019, there are currently 11 independent MPs, who have either chosen to leave their political party or have had the whip withdrawn.

In modern times, all Prime Ministers and Leaders of the Opposition have been drawn from the Commons, not the Lords. Alec Douglas-Home resigned from his peerages days after becoming Prime Minister in 1963, and the last Prime Minister before him from the Lords left in 1902 (the Marquess of Salisbury).

One party usually has a majority in Parliament, because of the use of the First Past the Post electoral system, which has been conducive in creating the current two party system. The monarch normally asks a person commissioned to form a government simply whether it can survive in the House of Commons, something which majority governments are expected to be able to do. In exceptional circumstances the monarch asks someone to 'form a government' with a parliamentary minority[8] which in the event of no party having a majority requires the formation of a coalition government or 'confidence and supply' arrangement. This option is only ever taken at a time of national emergency, such as war-time. It was given in 1916 to Bonar Law, and when he declined, to David Lloyd George and in 1940 to Winston Churchill. A government is not formed by a vote of the House of Commons, it is a commission from the monarch. The House of Commons gets its first chance to indicate confidence in the new government when it votes on the Speech from the Throne (the legislative programme proposed by the new government).

The House of Lords was previously a largely hereditary aristocratic chamber, although including life peers, and Lords Spiritual. It is currently midway through extensive reforms, the most recent of these being enacted in the House of Lords Act 1999. The house consists of two very different types of member, the Lords Temporal and Lords Spiritual. Lords Temporal include appointed members (life peers with no hereditary right for their descendants to sit in the house) and ninety-two remaining hereditary peers, elected from among, and by, the holders of titles which previously gave a seat in the House of Lords. The Lords Spiritual represent the established Church of England and number twenty-six: the Five Ancient Sees (Canterbury, York, London, Winchester and Durham), and the 21 next-most senior bishops.

The House of Lords currently acts to review legislation initiated by the House of Commons, with the power to propose amendments, and can exercise a suspensive veto. This allows it to delay legislation if it does not approve it for twelve months. However, the use of vetoes is limited by convention and by the operation of the Parliament Acts 1911 and 1949: the Lords may not veto the "money bills" or major manifesto promises (see Salisbury convention). Persistent use of the veto can also be overturned by the Commons, under a provision of the Parliament Act 1911. Often governments will accept changes in legislation in order to avoid both the time delay, and the negative publicity of being seen to clash with the Lords. However the Lords still retain a full veto in acts which would extend the life of Parliament beyond the 5-year term limit introduced by the Parliament Act 1911.

The Constitutional Reform Act 2005 outlined plans for a Supreme Court of the United Kingdom to replace the role of the Law Lords.

The House of Lords was replaced as the final court of appeal on civil cases within the United Kingdom on 1 October 2009, by the Supreme Court of the United Kingdom.

Though the UK parliament remains the sovereign parliament, Scotland has a parliament and Wales and Northern Ireland have assemblies. De jure, each could have its powers broadened, narrowed or changed by an Act of the UK Parliament. The UK is a unitary state with a devolved system of government. This contrasts with a federal system, in which sub-parliaments or state parliaments and assemblies have a clearly defined constitutional right to exist and a right to exercise certain constitutionally guaranteed and defined functions and cannot be unilaterally abolished by Acts of the central parliament.

All three devolved institutions are elected by proportional representation: the Additional Member System is used in Scotland and Wales, and Single Transferable Vote is used in Northern Ireland.

England, therefore, is the only country in the UK not to have its own devolved parliament. However, senior politicians of all main parties have voiced concerns in regard to the West Lothian Question,[9][10] which is raised where certain policies for England are set by MPs from all four constituent nations whereas similar policies for Scotland or Wales might be decided in the devolved assemblies by legislators from those countries alone. Alternative proposals for English regional government have stalled, following a poorly received referendum on devolved government for the North East of England, which had hitherto been considered the region most in favour of the idea, with the exception of Cornwall, where there is widespread support for a Cornish Assembly, including all five Cornish MPs.[11][12] England is therefore governed according to the balance of parties across the whole of the United Kingdom.

The government has no plans to establish an English parliament or assembly although several pressure groups[13] are calling for one. One of their main arguments is that MPs (and thus voters) from different parts of the UK have inconsistent powers. Currently an MP from Scotland can vote on legislation which affects only England but MPs from England (or indeed Scotland) cannot vote on matters devolved to the Scottish parliament. Indeed, the former Prime Minister Gordon Brown, who is an MP for a Scottish constituency, introduced some laws that only affect England and not his own constituency. This anomaly is known as the West Lothian question.

The policy of the UK Government in England was to establish elected regional assemblies with no legislative powers. The London Assembly was the first of these, established in 2000, following a referendum in 1998, but further plans were abandoned following rejection of a proposal for an elected assembly in North East England in a referendum in 2004. Unelected regional assemblies remain in place in eight regions of England.

The Scottish Parliament Building in Holyrood, Edinburgh, seat of the Scottish Parliament.

The debating chamber of the Scottish Parliament.

The Scottish Parliament is the national, unicameral legislature of Scotland, located in the Holyrood area of the capital Edinburgh. The Parliament, informally referred to as "Holyrood"[14] (cf. "Westminster"), is a democratically elected body comprising 129 members who are known as Members of the Scottish Parliament, or MSPs. Members are elected for four-year terms under the mixed member proportional representation system. As a result, 73 MSPs represent individual geographical constituencies elected by the plurality ("first past the post") system, with a further 56 returned from eight additional member regions, each electing seven MSPs.[15]

The current Scottish Parliament was established by the Scotland Act 1998 and its first meeting as a devolved legislature was on 12 May 1999. The parliament has the power to pass laws and has limited tax-varying capability. Another of its roles is to hold the Scottish Government to account. The "devolved matters" over which it has responsibility include education, health, agriculture, and justice. A degree of domestic authority, and all foreign policy, remains with the UK Parliament in Westminster.

The public take part in Parliament in a way that is not the case at Westminster through Cross-Party Groups on policy topics which the interested public join and attend meetings of alongside Members of the Scottish Parliament (MSPs).

The resurgence in Celtic language and identity, as well as 'regional' politics and development, has contributed to forces pulling against the unity of the state.[16] This was clearly demonstrated when - although some argue it was influenced by general public dillusionment with Labour - the Scottish National Party (SNP) became the largest party in the Scottish Parliament by one seat.

Alex Salmond (leader of SNP) has since made history by becoming the first First Minister of Scotland from a party other than Labour. The SNP governed as a minority administration at Holyrood following the 2007 Scottish Parliament election. Nationalism (support for breaking up the UK) has experienced a dramatic rise in popularity in recent years, with a pivotal moment coming at the 2011 Scottish Parliament election where the SNP capitalised on the collapse of the Liberal Democrat support to improve on their 2007 performance to win the first ever outright majority at Holyrood (despite the voting system being specifically designed to prevent majorities), with Labour remaining the largest opposition party.

This election result prompted the leader of the three main opposition parties to resign. Iain Gray was succeeded as Scottish Labour leader by Johann Lamont, Scottish Conservative and Unionist leader, Annabel Goldie was replaced by Ruth Davidson, and Tavish Scott, leader of the Scottish Liberal Democrats was replaced by Willie Rennie.

A major SNP manifesto pledge was to hold a referendum on Scottish Independence, which was duly granted by the UK Government and held on 18 September 2014. When the nationalists came to power in 2011, opinion polls placed support for independence at around 31%, but in 2014, 45% voted to leave the union. In the wake of the referendum defeat, membership of the SNP surged to over 100,000, overtaking the Liberal Democrats as the third largest political party in the UK by membership, and in the general election of May 2015 the SNP swept the board and took 56 of the 59 Westminster constituencies in Scotland (far surpassing their previous best of 11 seats in the late 1970s) and winning more than 50% of the Scottish vote.

Alex Salmond resigned as First Minister of Scotland and leader of the SNP following the country's rejection of independence in September 2014, and was succeeded in both roles by the deputy First Minister and deputy leader of the SNP, Nicola Sturgeon. Also in the wake of the referendum, Scottish Labour leader, Johann Lamont, stood down and Jim Murphy was elected to replace her. Mr Murphy was the leader of Scottish Labour Party until the general election on 2015 in which he lost his seat in Westminster, after the defeat he resigned his position and her deputy MSP Kezia Dugdale became leader of the party and leader of SLP in Holyrood. At 2017 she unexpectedly resigned and was elected as SLP leader the English born Richard Leonard.

The Senedd - The Welsh Assembly Building

The National Assembly for Wales is the devolved parliament of Wales with power to make legislation and vary taxes. The Assembly comprises 60 members, who are known as Assembly Members, or AMs (Welsh: Aelod y Cynulliad). Members are elected for four-year terms under an additional members system, where 40 AMs represent geographical constituencies elected by the plurality system, and 20 AMs from five electoral regions using the d'Hondt method of proportional representation.

The Siambr - The debating chamber of the Welsh Assembly

The Assembly was created by the Government of Wales Act 1998, which followed a referendum in 1997. On its creation, most of the powers of the Welsh Office and Secretary of State for Wales were transferred to it. The Assembly had no powers to initiate primary legislation until limited law-making powers were gained through the Government of Wales Act 2006. Its primary law-making powers were enhanced following a Yes vote in the referendum on 3 March 2011, making it possible for it to legislate without having to consult the UK parliament, nor the Secretary of State for Wales in the 20 areas that are devolved.[17]

Parliament Buildings in Stormont, Belfast, seat of the Northern Ireland Assembly.

The government of Northern Ireland was established as a result of the 1998 Good Friday Agreement. This created the Northern Ireland Assembly. The Assembly is a unicameral body consisting of 108 members elected under the Single Transferable Vote form of proportional representation. The Assembly is based on the principle of power-sharing, in order to ensure that both communities in Northern Ireland, unionist and nationalist, participate in governing the region. It has power to legislate in a wide range of areas and to elect the Northern Ireland Executive (cabinet). It sits at Parliament Buildings at Stormont in Belfast.

The Assembly has authority to legislate in a field of competences known as "transferred matters". These matters are not explicitly enumerated in the Northern Ireland Act 1998 but instead include any competence not explicitly retained by the Parliament at Westminster. Powers reserved by Westminster are divided into "excepted matters", which it retains indefinitely, and "reserved matters", which may be transferred to the competence of the Northern Ireland Assembly at a future date. Health, criminal law and education are "transferred" while royal relations are all "excepted".

While the Assembly was in suspension, due to issues involving the main parties and the Provisional Irish Republican Army (IRA), its legislative powers were exercised by the UK government, which effectively had power to legislate by decree. Laws that would normally be within the competence of the Assembly were passed by the UK government in the form of Orders-in-Council rather than legislative acts.

There has been a significant decrease in violence over the last twenty years, though the situation remains tense, with the more hard-line parties such as Sinn Féin and the Democratic Unionist Party now holding the most parliamentary seats (see Demographics and politics of Northern Ireland).

Both English law, which applies in England and Wales, and Northern Ireland law are based on common-law principles. The essence of common-law is that law is made by judges sitting in courts, applying their common sense and knowledge of legal precedent (stare decisis) to the facts before them. The Courts of England and Wales are headed by the Senior Courts of England and Wales, consisting of the Court of Appeal, the High Court of Justice (for civil cases) and the Crown Court (for criminal cases). The Supreme Court of the United Kingdom is the highest court in the land for both criminal and civil cases in England, Wales, and Northern Ireland and any decision it makes is binding on every other court in the hierarchy.

Scots law, a hybrid system based on both common-law and civil-law principles, applies in Scotland. The chief courts are the Court of Session, for civil cases, and the High Court of Justiciary, for criminal cases. The Supreme Court of the United Kingdom serves as the highest court of appeal for civil cases under Scots law. Sheriff courts deal with most civil and criminal cases including conducting criminal trials with a jury, known that as Sheriff solemn Court, or with a Sheriff and no jury, known as (Sheriff summary Court). The Sheriff courts provide a local court service with 49 Sheriff courts organised across six Sheriffdoms.

The Conservative Party won the largest number of seats at the 2015 general election, returning 330 MPs (plus the Speaker's seat, uncontested, bringing the total MPs to 331), enough for an overall majority, and went on to form the first Conservative majority government since the 1992 general election.

The Conservatives won only 318 seats at the 2017 general election, but went on to form a confidence and supply deal with the DUP (Democratic Unionist Party) who got 10 seats in the House of Commons, allowing the Conservative Party to remain in government.[21][22][23]

The Conservative Party can trace its origin back to 1662, with the Court Party and the Country Party being formed in the aftermath of the English Civil War. The Court Party soon became known as the Tories, a name that has stuck despite the official name being 'Conservative'. The term "Tory" originates from the Exclusion Bill crisis of 1678-1681 - the Whigs were those who supported the exclusion of the Roman Catholic Duke of York from the thrones of England, Ireland and Scotland, and the Tories were those who opposed it. Both names were originally insults: a "whiggamore" was a horse drover (See Whiggamore Raid), and a "tory" (Tóraidhe) was an Irish term for an outlaw, later applied to Irish Confederates and Irish Royalists, during the Wars of the Three Kingdoms.[24]

Generally, the Tories were associated with lesser gentry and the Church of England, while Whigs were more associated with trade, money, larger land holders (or "land magnates"), expansion and tolerance of Catholicism.

The Rochdale Radicals were a group of more extreme reformists who were also heavily involved in the cooperative movement. They sought to bring about a more equal society, and are considered by modern standards to be left-wing.

After becoming associated with repression of popular discontent in the years after 1815, the Tories underwent a fundamental transformation under the influence of Robert Peel, himself an industrialist rather than a landowner, who in his 1834 "Tamworth Manifesto" outlined a new "Conservative" philosophy of reforming ills while conserving the good.

Though Peel's supporters subsequently split from their colleagues over the issue of free trade in 1846, ultimately joining the Whigs and the Radicals to form what would become the Liberal Party, Peel's version of the party's underlying outlook was retained by the remaining Tories, who adopted his label of Conservative as the official name of their party.

The Conservatives were in government for eighteen years between 1979–1997, under the leadership of the first-ever female Prime Minister, Margaret Thatcher, and former Chancellor of the Exchequer John Major (1990–97). Their landslide defeat at the 1997 general election saw the Conservative Party lose over half their seats gained in 1992, and saw the party re-align with public perceptions of them. The Conservatives lost all their seats in both Scotland and Wales, and was their worst defeat since 1906.

In 2008, the Conservative Party formed a pact with the Ulster Unionist Party (UUP) to select joint candidates for European and House of Commons elections; this angered the DUP as by splitting the Unionist vote, republican parties will be elected in some areas.[25]

After thirteen years in opposition, the Conservatives returned to power as part of a coalition agreement with the Liberal Democrats in 2010, going on to form a majority government in 2015. David Cameron resigned as Prime Minister in July 2016, which resulted in the appointment of the country's second female Prime Minister, Theresa May. The Conservative Party is the only party in the history of the United Kingdom to have been governed by a female Prime Minister. In 2019, Boris Johnson was appointed Prime Minister after Theresa May stepped down during Brexit negotiations. At one point during 2019 his party had a parliamentary minority for a short period after he ejected a large number of party members, of which some were subsequently allowed to return for the 2019 General Election.

Historically, the party has been the mainland party most pre-occupied by British Unionism, as attested to by the party's full name, the Conservative & Unionist Party. This resulted in the merger between the Conservatives and Joseph Chamberlain's Liberal Unionist Party, composed of former Liberals who opposed Irish home rule. The unionist tendency is still in evidence today, manifesting sometimes as a scepticism or opposition to devolution, firm support for the continued existence of the United Kingdom in the face of movements advocating independence from the UK, and a historic link with the cultural unionism of Northern Ireland.

The Labour Party won the second-largest number of seats in the House of Commons at the 2017 general election, with 262 seats overall.

The history of the Labour Party goes back to 1900, when a Labour Representation Committee was established and changed its name to "The Labour Party" in 1906. After the First World War, this led to the demise of the Liberal Party as the main reformist force in British politics. The existence of the Labour Party on the left-wing of British politics led to a slow waning of energy from the Liberal Party, which has consequently assumed third place in national politics. After performing poorly at the general elections of 1922, 1923 and 1924, the Liberal Party was superseded by the Labour Party as being the party of the left.

Following two brief spells in minority governments in 1924 and 1929–1931, the Labour Party won a landslide victory after World War II at the 1945 "khaki election"; winning a majority for the first time ever. Throughout the rest of the twentieth century, Labour governments alternated with Conservative governments. The Labour Party suffered the "wilderness years" of 1951–1964 (three consecutive general election defeats) and 1979–1997 (four consecutive general election defeats).

During this second period, Margaret Thatcher, who became Leader of the Conservative Party in 1975, made a fundamental change to Conservative policies, turning the Conservative Party into an economically liberal party. At the 1979 general election, she defeated James Callaghan's Labour government following the Winter of Discontent.

For all of the 1980s and most of the 1990s, Conservative governments under Thatcher and her successor John Major pursued policies of privatisation, anti-trade-unionism, and, for a time, monetarism, now known collectively as Thatcherism.

The Labour Party elected left-winger Michael Foot as their leader in 1980, and he responded to dissatisfaction within the Labour Party by pursuing a number of radical policies developed by its grassroots members. In 1981, several centrist and right-leaning Labour MPs formed a breakaway group called the Social Democratic Party (SDP), a move which split Labour and is widely believed to have made the Labour Party unelectable for a decade. The SDP formed an alliance with the Liberal Party which contested the 1983 and 1987 general elections as a pro-European, centrist alternative to Labour and the Conservatives. After some initial success, the SDP did not prosper (partly due to its unfavourable distribution of votes by the First-Past-The-Post electoral system), and was accused by some of splitting the Labour vote.

The SDP eventually merged with the Liberal Party to form the Liberal Democrats in 1988. Support for the new party has increased since then, and the Liberal Democrats (often referred to as Lib Dems) gained an increased number of seats in the House of Commons at both the 2001 and 2005 general elections.

The Labour Party was defeated in a landslide at the 1983 general election, and Michael Foot was replaced shortly thereafter by Neil Kinnock as party leader. Kinnock progressively expelled members of Militant, a far left group which practised entryism, and moderated many of the party's policies. Despite these changes, as well as electoral gains and also due to Kinnock's negative media image, Labour was defeated at the 1987 and 1992 general elections, and he was succeeded by Shadow Chancellor of the Exchequer, John Smith .

Shadow Home Secretary Tony Blair became Leader of the Labour Party after John Smith's sudden death from a heart attack in 1994. He continued to move the Labour Party towards the "centre" by loosening links with the unions and continuing many of Margaret Thatcher's neoliberal policies. This coupled with the professionalising of the party machine's approach to the media, helped Labour win a historic landslide at the 1997 general election, after eighteen consecutive years of Conservative rule. Some observers say the Labour Party had by then morphed from a democratic socialist party to a social democratic party, a process which delivered three general election victories but alienated some of its core base; leading to the formation of the Socialist Labour Party (UK).

A subset of Labour MPs stand as joint Labour and Co-operative candidates due to a long-standing electoral alliance between the Labour Party and the Co-op Party - the political arm of the British co-operative movement. At the 2015 general election, 42 candidates stood using the Labour and Co-operative Party ticket,[26] of which 24 were elected.[27]

The Scottish National Party won the third-largest number of seats in the House of Commons at the 2015 general election, winning 56 MPs from the 59 constituencies in Scotland having won 50% of the popular vote. This was an increase of 50 MPs on the result achieved in 2010.

At the 2017 general election, the SNP won 35 seats, a net loss of 21 seats.

The SNP has enjoyed parliamentary representation continuously since 1967. Following the 2007 Scottish parliamentary elections, the SNP emerged as the largest party with 47 MSPs and formed a minority government with Alex Salmond as First Minister. After the 2011 Scottish parliamentary election, the SNP won enough seats to form a majority government, the first time this had ever happened since devolution was established in 1999.

Members of the Scottish National Party and Plaid Cymru work together as a single parliamentary group[28] following a formal pact signed in 1986. This group currently has 39 MPs.

The Liberal Democrats won the joint-fourth largest number of seats at the 2017 general election, returning 12 MPs.

The Liberal Democrats were founded in 1988 by an amalgamation of the Liberal Party with the Social Democratic Party, but can trace their origin back to the Whigs and the Rochdale Radicals who evolved into the Liberal Party. The term 'Liberal Party' was first used officially in 1868, though it had been in use colloquially for decades beforehand. The Liberal Party formed a government in 1868 and then alternated with the Conservative Party as the party of government throughout the late-nineteenth century and early-twentieth century.

The Liberal Democrats are a party with policies on constitutional and political reforms, including changing the voting system for general elections (2011 United Kingdom Alternative Vote referendum), abolishing the House of Lords and replacing it with a 300-member elected Senate, introducing fixed five-year Parliaments, and introducing a National Register of Lobbyists. They also support what they see as greater fairness and social mobility. In the coalition government, the party promoted legislation introducing a pupil premium - funding for schools directed at the poorest students to give them an equal chance in life. They also supported same-sex marriage and increasing the income tax threshold to £10,000, a pre-election manifesto commitment.

The Democratic Unionist Party (DUP) had 10 MPs elected at the 2017 general election. Founded in 1971 by Ian Paisley, it has grown to become the larger of the two main unionist political parties in Northern Ireland. Sinn Féin MPs had 7 MPs elected at the 2017 election, but Sinn Féin MPS traditionally abstain from the House of Commons and refuse to take their seats in what they view as a "foreign" parliament.

Plaid Cymru has enjoyed parliamentary representation continuously since 1974 and had 4 MPs elected at the 2017 general election. Following the 2007 Welsh Assembly elections, they joined Labour as the junior partner in a coalition government, but have fallen down to the third-largest party in the Assembly after the 2011 Assembly elections, and have become an opposition party.

The Green Party of England and Wales kept its sole MP, Caroline Lucas, in the 2017 general election (it previously had an MP in 1992; Cynog Dafis, Ceredigion, who was elected on a joint Plaid Cymru/Green Party ticket). It also has seats in the European Parliament, two seats on the London Assembly and around 250 local councillors.[29]

The UK Independence Party (UKIP) had one MP and 24 seats in the European Parliament as well as seats in the House of Lords and a number of local councillors. UKIP also had a MLA in the Northern Ireland Assembly. UKIP has become an emerging alternative party among some voters, gaining the third-largest share of the vote in the 2015 general election and the largest share of the vote of any party (27%) in the 2014 European elections. In 2014 UKIP gained its first ever MP following the defection and re-election of Douglas Carswell in the 2014 Clacton by-election. They campaign mainly on issues such as reducing immigration and EU withdrawal.

The Respect party, a left-wing group that came out of the anti-war movement had a single MP, George Galloway from 2005-2010, and again between 2012-2015.[30]

Change UK - The Independent Group was a political party formed and disbanded in 2019. It had 5 MPs, of whom 4 were elected as Labour MPs, and 1 as Conservative MPs.

There are usually a small number of Independent politicians in parliament with no party allegiance. In modern times, this has usually occurred when a sitting member leaves their party, and some such MPs have been re-elected as independents. The only independent MP elected at the 2017 General Election is Sylvia Hermon, previously of the Ulster Unionist Party, though there are currently 11 MPs sitting as Independents. Since 1950, only two new members have been elected as independents without having ever stood for a major party:

• Martin Bell represented the Tatton constituency in Cheshire between 1997 and 2001. He was elected following a "sleaze" scandal involving the-then incumbent Conservative MP, Neil Hamilton. Bell, a BBC journalist, stood as an anti-corruption independent candidate, and the Labour and Liberal Democrat parties withdrew their candidates from the election.
• Dr. Richard Taylor MP was elected for the Wyre Forest constituency in 2001 on a platform opposing the closure of Kidderminster hospital. He later established Health Concern, the party under which he ran in 2005.

Other UK political parties exist, but generally threaten, rather than succeed in returning regular MPs to Parliament.

The Brexit Party was founded in January 2019, with leader Nigel Farage (former retired UKIP leader). It initially had 14 MEPs, all of whom had been elected as members of UKIP. In the 2019 European Parliament election in the United Kingdom, it returned 29 MEPs.

The Scottish Green Party has 6 MSPs in the Scottish Parliament and 19 local councillors.

The Green Party in Northern Ireland has two MLAs in the Northern Ireland Assembly, as well as 8 local councillors.

The British National Party (BNP) won two seats in the European Parliament in the 2009 European elections, before losing both seats in 2014. In May 2018 the party lost its last elected representative (a local councillor).[31]

The Libertarian Party was founded in 2008 and has contested several local elections and parliamentary constituencies.

The English Democrats was founded in 2002 and advocates England having its own parliament. The party's candidate was elected mayor of Doncaster in 2009, before resigning from the party in February 2013.[32]

Other parties include: the Socialist Labour Party (UK), the Free England Party, the Communist Party of Britain, the Socialist Party (England and Wales), the Socialist Workers Party, the Scottish Socialist Party, the Liberal Party, Mebyon Kernow (a Cornish nationalist party) in Cornwall, the Yorkshire Party in Yorkshire, the Communist Left Alliance (in Fife) and the Pirate Party UK.

Several local parties contest only within a specific area, a single county, borough or district. Examples include the Better Bedford Independent Party, which was one of the dominant parties in Bedford Borough Council and led by Bedford's former Mayor, Frank Branston. The most notable local party is Health Concern, which controlled a single seat in the UK Parliament from 2001 to 2010.

The Jury Team, launched in March 2009 and described as a "non-party party", is an umbrella organisation seeking to increase the number of independent members of both domestic and European members of Parliament in Great Britain.[33]

The Official Monster Raving Loony Party was founded in 1983. The OMRLP are distinguished by having a deliberately bizarre manifesto, which contains things that seem to be impossible or too absurd to implement – usually to highlight what they see as real-life absurdities. It is effectively regarded as a satirical political party.

After winning the largest number of seats and votes in the 2015 general election, the Conservatives under David Cameron, remained ahead of the Labour Party, led by Jeremy Corbyn since September 2015. The SNP maintained its position in Scotland, the party was just short of an overall majority at the Scottish parliamentary elections in May 2016.

However, a turbulent referendum on the United Kingdom's membership of the European Union, called for by David Cameron, led to his resignation, the appointment of a new prime minister Theresa May, and divided opinion on Europe amongst the party.

In addition, the EU referendum campaign plunged the Labour Party into crisis and resulted in a motion of no confidence in the party leader Jeremy Corbyn being passed by the party's MPs in a 172-40 vote,[34] which followed a significant number of resignations from the Shadow Cabinet. This led to a leadership election which began with Angela Eagle, the former Shadow First Secretary of State and Shadow Secretary of State for Business, Innovation and Skills who eight days later withdrew from the leadership race, to support Owen Smith, the former Shadow Secretary of State for Work and Pensions. This was won by Jeremy Corbyn with an increased majority.

Following the vote to leave the European Union, Nigel Farage offered his own resignation as leader, something he had campaigned for since 1992. A leadership contest also took place in the Green Party, which led to the joint election on 2 September 2016 of Jonathan Bartley and Caroline Lucas as co-leaders, who took over the role in a job-share arrangement.[35] Lucas, was previously leader until 2010 and is the party's only MP. Strategic cross-party alliances have been initiated, including a "progressive alliance" and a "Patriotic Alliance",[36][37] as proposed by UKIP donor Aaron Banks.

In 2017, the prime minister, Theresa May, called a general election. She hoped to increase the conservative majority to diffuse party opposition to her deal to leave the EU. In the election, the conservatives lost seats and the Labour party, under Jeremy Corbyn, gained 30 seats. This led to a minority conservative government supported by the DUP.

The Economist Intelligence Unit (EIU) rated the United Kingdom as a "full democracy" in 2017.[38] In the 2018 EIU democracy index, the UK remained 11th out of the 14 western european nations classed as 'full democracy' with an overall score of 8.53 out of a maximum of 10.[39] It received a comparatively low mark in the 'functioning of government' assessment.

In July 2019, Boris Johnson won the leadership of the conservative party following the resignation of May. He became the prime minister by default.

In August 2019, Prime Minister Boris Johnson requested the monarch, Queen Elizabeth II, to prorogue the UK parliament.[40] Although this measure is common for incoming governments to allow time to prepare the Queen's speech, the move caused great controversy as it was announced to last 23 days instead of the usual 4 or 5 days.[41] It would end the current session of the Parliament that had been running for 2 years and prevent further parliamentary debate. The government stated that it was nothing to do with Brexit and that there would still be "ample time" for debate before Brexit happens.[42] Opponents believed that parliament had been suspended to force through a no-deal Brexit and prevent parliament from being able to thwart the government's plan. Others argued that it facilitated the Brexit negotiations by forcing the EU to modify the current proposed deal. The move is unprecented in UK politics and caused debate in the media, an attempt to stop it in the Scotish Court of Session, an attempt by ex-prime minister John Major and others to stop it in the English High Court and in the High Court in Northern Ireland.[43] It was reported by many media sources that the move takes the UK one more step towards a full dictatorship from its current status of 'elective dictatorship'.[44] The legality of the suspension of parliament was tested in courts in England and Scotland. The case was appealed to the Supreme Court of the United Kingdom. On 24 September, it ruled unanimously that the prorogation was both justiciable and unlawful. The prorogation was quashed and deemed "null and of no [legal] effect". Parliament resumed the next day.

On the return of parliament the government lost its majority when Conservative MP Phillip Lee crossed the floor of the house to join the Liberal Democrats.[45] This meant that the combined votes of the Conservative and DUP MPs amounted to one less than the combined votes of opposition parties. The government of Boris Johnson then lost a vote, 301 to 328, giving control of the agenda of the house to the MPs, removing the control the government had over the introduction of new laws.[46] The 21 Conservative MPs who voted against their own government had the whip removed by number 10, removing them from the party. This included long-standing members of the party.[47] Johnson called for a general election and following a few attempts suceeded in getting a vote approving an election through parliament.

In the December 2019 general election, the Conservative Party, led by Boris Johnson, won a large overall majority. Jeremy Corbyn resigned as leader of the Labour Party. Jo Swinson resigned as Lib Dem leader after losing her own seat.[48]

On 20 December 2019, the Brexit withdrawal agreement was passed. The UK left the EU on 31 January 2020 at 11 p.m. GMT and entered a transition period, set to finish on 31 December 2020.

In January 2020, the Labour Party began the process of electing a new leader.

All political parties have membership schemes that allow members of the public to actively influence the policy and direction of the party to varying degrees, though particularly at a local level. Membership of British political parties is around 1% of the British electorate,[49] which is lower than in all European countries except for Poland and Latvia.[50] Overall membership to a political party has been in decline since the 1950s.[51] In 1951, the Conservative Party had 2.2 million members, and a year later in 1952 the Labour Party reached their peak of 1 million members (of an electorate of around 34 million).[52]

The table below details the membership numbers of political parties that have more than 5,000 members.

No data could be collected for the four parties of Northern Ireland: the DUP, UUP, SDLP, and Sinn Féin. However, in January 1997, it was estimated that the UUP had 10-12,000 members, and the DUP had 5,000 members.[57]

• 2010s in United Kingdom political history
• Premiership of Boris Johnson