The legislatures of the United Kingdom are derived from a number of different sources. The Parliament of the United Kingdom is the supreme legislative body for the United Kingdom and the British overseas territories with Scotland, Wales and Northern Ireland each having their own devolved legislatures. Each of the three major jurisdictions of the United Kingdom has its own laws and legal system.
The European Communities Act 1972, also known as the ECA 1972, was an act of the Parliament of the United Kingdom which made legal provision for the accession of the United Kingdom as a member state to the three European Communities (EC) – the European Economic Community, European Atomic Energy Community (Euratom), and the European Coal and Steel Community ; the EEC and ECSC subsequently became the European Union.
In the United Kingdom, the boundary commissions are non-departmental public bodies responsible for determining the boundaries of parliamentary constituencies for elections to the House of Commons. There are four boundary commissions: one each for England, Scotland, Wales and Northern Ireland.
Referendums in the United Kingdom are occasionally held at a national, regional or local level. Historically, national referendums are rare due to the long-standing principle of parliamentary sovereignty. Legally there is no constitutional requirement to hold a national referendum for any purpose or on any issue however the UK Parliament is free to legislate through an Act of Parliament for a referendum to be held on any question at any time.
In the United Kingdom (UK), each of the electoral areas or divisions called constituencies elects one member to the House of Commons.
The Senedd constituencies and electoral regions are the electoral districts used to elect members of the Senedd to the Senedd, and have been used in some form since the first election of the then National Assembly for Wales in 1999. New boundaries were introduced for the 2007 elections and currently consist of forty constituencies and five regions. The five electoral regions are: Mid and West Wales, North Wales, South Wales Central, South Wales East, and South Wales West, with the forty constituencies listed below. Voting last took place in all districts in the 2021 Senedd election, and is not used for local government.
There are five types of elections in the United Kingdom: elections to the House of Commons of the United Kingdom, elections to devolved parliaments and assemblies, local elections, mayoral elections, and Police and Crime Commissioner elections. Within each of those categories, there may also be by-elections. Elections are held on Election Day, which is conventionally a Thursday, and under the provisions of the Dissolution and Calling of Parliament Act 2022 the timing of general elections can be held at the discretion of the prime minister during any five-year period. All other types of elections are held after fixed periods, though early elections to the devolved assemblies and parliaments can occur in certain situations. The five electoral systems used are: the single member plurality system (first-past-the-post), the multi-member plurality, the single transferable vote, the additional member system, and the supplementary vote.
The Parliamentary Voting System and Constituencies Act 2011(c. 1) is an Act of the Parliament of the United Kingdom that made provision for the holding of a referendum on whether to introduce the Alternative Vote system in all future general elections to the UK Parliament and also made provision on the number and size of parliamentary constituencies. The Bill for the Act was introduced to the House of Commons on 22 July 2010 and passed third reading on 2 November by 321 votes to 264. The House of Lords passed the Bill, with amendments, on 14 February 2011, and after some compromises between the two Houses on amendments, it received Royal Assent on 16 February 2011.
On 5 May 2011, the United Kingdom held a referendum on whether to change the system for electing members to the House of Commons, the lower house of the national Parliament at Westminster. In the event of a "Yes" vote, future general elections would use the "alternative vote"; in the event of a "No" vote, the existing first-past-the-post system would remain in place. The votes cast in the referendum were first counted in each of 440 districts or electoral divisions across the country, which were then combined and declared at a regional level.
Parliamentary sovereignty is an ancient concept central to the functioning of the constitution of the United Kingdom but which is also not fully defined and has long been debated. Since the subordination of the monarchy under parliament, and the increasingly democratic methods of parliamentary government, there have been the questions of whether parliament holds a supreme ability to legislate and whether or not it should.
This is a table of the former European Parliament constituencies in the United Kingdom, listing the number of Members of the European Parliament each elected at each European Parliamentary election. The United Kingdom left the European Union on 31 January 2020. As a result, these constituencies no longer exist.
The Referendum Act 1975 also known at the time as the Referendum Bill was an act of the Parliament of the United Kingdom, which made legal provision for the holding of a consultative referendum on whether the United Kingdom should remain a member of the European Communities (EC)—generally known at the time in the UK, with reference to their main component, the European Economic Community (EEC) as stipulated in the Act, also known at the time as the "Common Market". The Referendum Bill was introduced to the House of Commons by the Leader of the House of Commons and Lord President of the Council Edward Short on 26 March 1975; on its second reading on 10 April 1975, MPs voted 312–248 in favour of holding the referendum—which came the day after they voted to stay in the European Communities on the new terms set out in the renegotiation.
The European Union Referendum Act 2015 was an Act of the Parliament of the United Kingdom that made legal provision for a consultative referendum to be held in the United Kingdom and Gibraltar, on whether it should remain a member state of the European Union or leave the bloc altogether. The Bill was introduced to the House of Commons by Philip Hammond, Foreign Secretary on 28 May 2015. Two weeks later, the second reading of the Bill was supported by MPs from all parties except the SNP; the Bill subsequently passed on its third reading in the Commons on 7 September 2015. It was approved by the House of Lords on 14 December 2015, and given Royal Assent on 17 December 2015. The Act came partly into force on the same day and came into full legal force on 1 February 2016.
The European Union (Referendum) Act 2016 was an Act of the Gibraltar Parliament, which implements the United Kingdom's European Union Referendum Act 2015 in Gibraltar. It was the first time a referendum has been held in Gibraltar on the issue of continued EU membership since the territory joined along with the United Kingdom in 1973 and was the first time that any British Overseas Territory had participated in a UK-wide referendum. The Act commenced on 26 January 2016, and received assent from the Governor of Gibraltar on 28 January 2016.
The 2016 United Kingdom European Union membership referendum took place in the United Kingdom and Gibraltar on 23 June 2016. Membership of the European Union had been a topic of political debate in the United Kingdom since the country joined the European Communities in 1973. This referendum was conducted very differently from the European Communities membership referendum in 1975; a more localised and regionalised counting procedure was used, and the ballot was overseen by the Electoral Commission, a public body that did not exist at the time of the first vote. This article lists, by voting area for Great Britain and Gibraltar and by parliamentary constituency for Northern Ireland, all the results of the referendum, each ordered into national and regional sections.
The European Union (Withdrawal) Act 2018 is an Act of the Parliament of the United Kingdom to repeal the European Communities Act 1972, and for parliamentary approval to be required for any withdrawal agreement negotiated between the Government of the United Kingdom and the European Union. Initially proposed as the Great Repeal Bill, its passage through both Houses of Parliament was completed on 20 June 2018 and it became law by Royal Assent on 26 June.
This is a list of current, amended, spent and repealed acts of the Parliament of the United Kingdom relating to its former membership and current relationship to the European Communities and the European Union from 1972 onwards.
The 2019 European Parliament election in Ireland is the Irish component of the 2019 European Parliament election and was held on Friday, 24 May 2019, on the same day as the 2019 local elections and a referendum easing restrictions on divorce. The election was conducted in three constituencies under the single transferable vote (STV). Thirteen MEPs were elected, but the last candidate elected in both Dublin and South did not take their seats until after Brexit on 31 January 2020.
The European Union Act 2020 is an act of the Parliament of the United Kingdom that makes legal provision for ratifying the Brexit withdrawal agreement and incorporating it into the domestic law of the United Kingdom. It is the most significant constitutional piece of legislation to be passed by Parliament of the Second Johnson ministry. The Withdrawal Agreement was the result of Brexit negotiations.
The European Union Withdrawal Agreement Bill 2017–19 was a private member's bill of the Parliament of the United Kingdom to make provision for the holding of a “public vote” (referendum) in the United Kingdom and Gibraltar following the conclusion of negotiations by Her Majesty's Government and the European Union on whether to support the proposed exit deal for the United Kingdom's withdrawal from the European Union or to remain a member state of the EU. The bill was sponsored by English Labour Co-operative MP Gareth Thomas. The bill failed upon the conclusion of the parliamentary session in November 2019, and withdrawal took place on 31 January 2020 without a second referendum.
