Northern Ireland in the context of Maghery

The European single market, also known as the European internal market or the European common market, is the single market comprising mainly the 27 member states of the European Union (EU). With certain exceptions, it also comprises Iceland, Liechtenstein, Norway (through the Agreement on the European Economic Area), and Switzerland (through sectoral treaties). The single market seeks to guarantee the free movement of goods, capital, services, and people, known collectively as the four freedoms of the European Union. This is achieved through common rules and standards that all participating states are legally committed to follow.

Any potential EU accession candidates are required to make association agreements with the EU during the negotiation, which must be implemented prior to accession. In addition, through three individual agreements on a Deep and Comprehensive Free Trade Area (DCFTA) with the EU, Georgia, Moldova, and Ukraine have also been granted limited access to the single market in selected sectors. Turkey has access to the free movement of some goods via its membership in the European Union–Turkey Customs Union. The United Kingdom left the European single market on 31 December 2020. An agreement was reached between the UK Government and European Commission to align Northern Ireland on rules for goods with the European single market, to maintain an open border on the island of Ireland.

Ireland is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially named Ireland – a sovereign state covering five-sixths of the island) and Northern Ireland (part of the United Kingdom – covering the remaining sixth). It is separated from Great Britain to its east by the North Channel, the Irish Sea, and St George's Channel. Ireland is the second-largest island of the British Isles, the third-largest in Europe, and the twentieth-largest in the world. As of 2022, the population of the entire island is just over 7 million, with 5.1 million in the Republic of Ireland and 1.9 million in Northern Ireland, ranking it the second-most populous island in Europe after Great Britain.

The geography of Ireland comprises relatively low-lying mountains surrounding a central plain, with several navigable rivers extending inland. Much of Ireland was woodland until the end of the Middle Ages. Today, woodland makes up about 10% of the island, compared with a European average of over 33%, with most of it being non-native conifer plantations. Its lush vegetation is a product of its mild climate, which is influenced by the Atlantic Ocean and thus very moderate, and winters are milder than expected for such a northerly area, although summers are cooler than those in continental Europe. Rainfall and cloud cover are abundant.

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland, with a population of over 69 million in 2024. The UK includes the island of Great Britain, the north-eastern part of the island of Ireland, and most of the smaller islands within the British Isles, covering 94,354 square miles (244,376 km). It shares a land border with the Republic of Ireland and is otherwise surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea, while maintaining sovereignty over the British Overseas Territories. The capital and largest city of both England and the UK is London; Edinburgh, Cardiff and Belfast are the national capitals of Scotland, Wales and Northern Ireland.

Britain has been inhabited since the Neolithic. In AD 43 the Roman conquest of Britain began. The Roman departure between 383 and 410 was followed by Anglo-Saxon settlement beginning around 450. In 1066 the Normans conquered England. After the Wars of the Roses, the Kingdom of England began to flourish, resulting in the 16th-century annexation of Wales and the establishment of the British Empire. Over the 17th century the role of the British monarchy was reduced, particularly as a result of the English Civil War. In 1707 the Kingdom of England and the Kingdom of Scotland united under the Treaty of Union to create the Kingdom of Great Britain. In the Georgian era the office of prime minister became established. The Acts of Union 1800 incorporated the Kingdom of Ireland to create the United Kingdom of Great Britain and Ireland in 1801. Most of Ireland seceded from the UK in 1922 as the Irish Free State, and the Royal and Parliamentary Titles Act 1927 created the present United Kingdom.

Ireland (Irish: Éire [ˈeːɾʲə] ), also known as the Republic of Ireland (Poblacht na hÉireann), is a country in Northwestern Europe. It consists of 26 of the 32 counties of the island of Ireland, with a population of about 5.4 million. Its capital and largest city is Dublin, on the eastern side of the island, with a population of over 1.5 million. The sovereign state shares its only land border with Northern Ireland, which is part of the United Kingdom. It is otherwise surrounded by the Atlantic Ocean, with the Celtic Sea to the south, St George's Channel to the south-east and the Irish Sea to the east. It is a unitary, parliamentary republic. The legislature, the Oireachtas, consists of a lower house, Dáil Éireann; an upper house, Seanad Éireann; and an elected president (Uachtarán) who serves as the largely ceremonial head of state, but with some important powers and duties. The head of government is the Taoiseach (prime minister, lit. 'chief'), elected by the Dáil and appointed by the president, who appoints other government ministers.

The Irish Free State was created with Dominion status in 1922, following the Anglo-Irish Treaty. In 1937, a new constitution was adopted, in which the state was named "Ireland" and effectively became a republic, with an elected non-executive president. It was officially declared a republic in 1949, following The Republic of Ireland Act 1948. Ireland became a member of the United Nations in 1955. It joined the European Communities (EC), the predecessor of the European Union (EU), in 1973. The state had no formal relations with Northern Ireland for most of the 20th century, but the 1980s and 1990s saw the British and Irish governments working with Northern Irish parties to resolve the conflict that had become known as the Troubles. Since the signing of the Good Friday Agreement in 1998, the Irish government and Northern Irish government have co-operated on a number of policy areas under the North/South Ministerial Council created by the Agreement.

Soil, also commonly referred to as earth, is a mixture of organic matter, minerals, gases, water, and organisms that together support the life of plants and soil organisms. Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil.

Soil consists of a solid collection of minerals and organic matter (the soil matrix), as well as a porous phase that holds gases (the soil atmosphere) and a liquid phase that holds water and dissolved substances both organic and inorganic, in ionic or in molecular form (the soil solution). Accordingly, soil is a complex three-state system of solids, liquids, and gases. Soil is a product of several factors: the influence of climate, relief (elevation, orientation, and slope of terrain), organisms, and the soil's parent materials (original minerals) interacting over time. It continually undergoes development by way of numerous physical, chemical and biological processes, which include weathering with associated erosion. Given its complexity and strong internal connectedness, soil ecologists regard soil as an ecosystem.

The culture of the United Kingdom is influenced by its combined nations' history, its interaction with the cultures of Europe, the individual diverse cultures of England, Wales, Scotland and Northern Ireland, and the impact of the British Empire. The culture of the United Kingdom may also colloquially be referred to as British culture. Although British culture is a distinct entity, the individual cultures of England, Scotland, Wales and Northern Ireland are diverse. There have been varying degrees of overlap and distinctiveness between these four cultures. British literature is particularly esteemed. The modern novel was developed in Britain, and playwrights, poets, and authors are among its most prominent cultural figures. Britain has also made notable contributions to theatre, music, cinema, art, architecture and television. The UK is also the home of the Church of England, Church of Scotland, Church in Wales, the state church and mother church of the Anglican Communion, the third-largest Christian denomination. Britain contains some of the world's oldest universities, has made many contributions to philosophy, science, technology and medicine, and is the birthplace of many prominent scientists and inventions. The Industrial Revolution began in the UK and had a profound effect on socio-economic and cultural conditions around the world.

British culture has been influenced by historical and modern migration, the historical invasions of Great Britain, and the British Empire. As a result of the British Empire, significant British influence can be observed in the language, law, culture and institutions of its former colonies, most of which are members of the Commonwealth of Nations. A subset of these states form the Anglosphere, and are among Britain's closest allies. British colonies and dominions influenced British culture in turn, particularly British cuisine.

The Parliament of the United Kingdom currently has 650 parliamentary constituencies across the constituent countries (England, Scotland, Wales, and Northern Ireland), each electing a single member of parliament (MP) to the House of Commons by the plurality (first-past-the-post) voting system, ordinarily every five years. Voting last took place in all 650 of those constituencies at the United Kingdom general election on 4 July 2024.

The number of seats rose from 646 to 650 at the 2010 general election after proposals made by the boundary commissions for England, Wales, and Northern Ireland (the Fifth Periodic Review of Westminster constituencies) were adopted through statutory instruments. Constituencies in Scotland remained unchanged, as the Boundary Commission for Scotland had completed a review just before the 2005 general election, which had resulted in a reduction of 13 seats.

The Supreme Court of the United Kingdom (initialism: UKSC) is the final court of appeal for all civil cases in the United Kingdom and all criminal cases originating in England, Wales and Northern Ireland, as well as some limited criminal cases from Scotland.

As the United Kingdom's highest appellate court for these matters, it hears cases of the greatest public or constitutional importance affecting the whole population. Additionally the Supreme Court hears cases on devolution matters from Scotland, Wales and Northern Ireland. As a consequence, the court must include judges from the three distinct legal systems of the United Kingdom – England and Wales, Scotland and Northern Ireland, made up collectively of twelve Scottish, English, Welsh and Northern Irish judges.

An act of Parliament in the United Kingdom is primary legislation passed by the UK Parliament in Westminster, London.

An act of Parliament can be enforced in all four of the UK constituent countries (England, Scotland, Wales and Northern Ireland). As a result of devolution the majority of acts that are passed by Parliament increasingly only apply either to England and Wales only, or England only. Generally acts only relating to constitutional and reserved matters now apply to the whole of the United Kingdom.

The Irish Free State (6 December 1922 – 29 December 1937), also known by its Irish name Saorstát Éireann (English: /ˌsɛərstɑːt ˈɛərən/ SAIR-staht AIR-ən, Irish: [ˈsˠiːɾˠsˠt̪ˠaːt̪ˠ ˈeːɾʲən̪ˠ]), was a state established in December 1922 under the Anglo-Irish Treaty of December 1921. The treaty ended the three-year Irish War of Independence between the forces of the Irish Republic—the Irish Republican Army (IRA)—and British Crown forces.

The Free State was established as a dominion of the British Empire. It comprised 26 of the 32 counties of Ireland. Northern Ireland, which was made up of the remaining six counties, exercised its right under the Treaty to opt out of the new state. The Irish Free State government consisted of the governor-general—the viceregal representative of the King—and the Executive Council (cabinet), which replaced both the revolutionary Dáil Government and the Provisional Government set up under the Treaty. W. T. Cosgrave, who had led both of these administrations since August 1922, became the first president of the Executive Council (prime minister). The Oireachtas or legislature consisted of Dáil Éireann (the lower house) and Seanad Éireann (the upper house), also known as the Senate. Members of the Dáil were required to take an Oath of Allegiance to the Constitution of the Free State and to declare fidelity to the King. The oath was a key issue for opponents of the Treaty, who refused to take it and therefore did not take their seats. Pro-Treaty members, who formed Cumann na nGaedheal in 1923, held an effective majority in the Dáil from 1922 to 1927 and thereafter ruled as a minority government until 1932.

The 1921 Anglo-Irish Treaty (Irish: An Conradh Angla-Éireannach), commonly known in Ireland as The Treaty and officially the Articles of Agreement for a Treaty Between Great Britain and Ireland, was an agreement between the government of the United Kingdom of Great Britain and Ireland and the government of the Irish Republic that concluded the Irish War of Independence. It provided for the establishment of the Irish Free State within a year as a self-governing dominion within the "community of nations known as the British Empire", a status "the same as that of the Dominion of Canada". It also provided Northern Ireland, which had been created by the Government of Ireland Act 1920, an option to opt out of the Irish Free State (Article 12), which was exercised by the Parliament of Northern Ireland.

The agreement was signed in London on 6 December 1921, by representatives of the British government (which included Prime Minister David Lloyd George, who was head of the British delegates, and Winston Churchill, who was Secretary of State for the Colonies) and by representatives of the government of the Irish Republic (which included Michael Collins, who was Secretary of State for Finance, and Arthur Griffith, who was Secretary of State for Foreign Affairs). The Irish representatives had plenipotentiary status (negotiators empowered to sign a treaty without reference back to their superiors) acting on behalf of the Irish Republic, though the British government declined to recognise that status. As required by its terms, the agreement was approved by "a meeting" of the members elected to sit in the House of Commons of Southern Ireland and [separately] by the British Parliament. In reality, Dáil Éireann (the legislative assembly for the de facto Irish Republic) first debated then approved the treaty; members then went ahead with the "meeting". Though the treaty was narrowly approved, the split led to the Irish Civil War, which was won by the pro-treaty side.

In the United Kingdom, a listed building is a structure of particular architectural or historic interest deserving of special protection. Such buildings are placed on one of the four statutory lists maintained by Historic England in England, Historic Environment Scotland in Scotland, Cadw in Wales, and the Historic Environment Division of the Department for Communities in Northern Ireland. The classification schemes differ between England and Wales, Scotland, and Northern Ireland (see sections below). The term has also been used in the Republic of Ireland, where buildings are protected under the Planning and Development Act 2000, although the statutory term in Ireland is "protected structure".

A listed building may not be demolished, extended, or altered without permission from the local planning authority, which typically consults the relevant central government agency. In England and Wales, a national amenity society must be notified of any work to be done on a listed building which involves any element of demolition.

The United Kingdom of Great Britain and Northern Ireland, referred to as simply "Great Britain", has been represented at every modern Olympic Games. As of the 2024 Summer Olympics, it is third in the all-time Summer Olympic medal table by overall number of medals, and fourth in number of gold medals won. London hosted the Summer Olympic Games in 1908, 1948 and 2012.

Athletes from the United Kingdom compete as part of the Great Britain and Northern Ireland Olympic Team, branded "Team GB". The team is organised by the British Olympic Association, the National Olympic Committee for the UK. Team GB also represents the United Kingdom's Overseas Territories (with the exceptions of Bermuda, the British Virgin Islands, and the Cayman Islands), and the three Crown Dependencies of Guernsey, Jersey, and the Isle of Man. Athletes from Northern Ireland can choose to compete for either Great Britain or Ireland, with most choosing Ireland. The use of "Great Britain" over "United Kingdom" has faced criticism in Northern Ireland.

British people or Britons, also known colloquially as Brits, are the citizens and diaspora of the United Kingdom, the British Overseas Territories, and the Crown dependencies. British nationality law governs modern British citizenship and nationality, which can be acquired, for instance, by descent from British nationals. When used in a historical context, "British" or "Britons" can refer to the Ancient Britons, the Celtic-speaking inhabitants of Great Britain during the Iron Age, whose descendants formed the major part of the modern Welsh people, Cornish people, Bretons and considerable proportions of English people. It also refers to those British subjects born in parts of the former British Empire that are now independent countries who settled in the United Kingdom prior to 1973.

Though early assertions of being British date from the Late Middle Ages, the Union of the Crowns in 1603 and the creation of the Kingdom of Great Britain in 1707 triggered a sense of British national identity. The notion of Britishness and a shared British identity was forged during the 18th century and early 19th century when Britain engaged in several global conflicts with France, and developed further during the Victorian era. The complex history of the formation of the United Kingdom created a "particular sense of nationhood and belonging" in Great Britain; Britishness became "superimposed on much older identities", of English, Scots and Welsh cultures, whose distinctiveness still resists notions of a homogenised British identity. Because of longstanding ethno-sectarian divisions, British identity in Northern Ireland is controversial, but it is held with strong conviction by Unionists.

Geographic contiguity is the characteristic in geography of political or geographical land divisions, as a group, not being interrupted by other land or water. Such divisions are referred to as being contiguous. In the United States, for example, the "48 contiguous states" excludes Hawaii and Alaska, which do not share borders with other U.S. states.

Other examples of geographical contiguity might include the "contiguous European Union" excluding member states such as Ireland, Sweden, Finland (between Åland and Turku Archipelago), Malta and Cyprus (these being non-contiguous), or the "contiguous United Kingdom" referring to all parts of the country excepting Northern Ireland (it being geographically non-contiguous).

Ulster English, also called Northern Hiberno-English or Northern Irish English, is the variety of English spoken mostly around the Irish province of Ulster and throughout Northern Ireland. The dialect has been influenced by the local Ulster dialect of the Scots language, brought over by Scottish settlers during the Plantation of Ulster and subsequent settlements throughout the 17th and 18th centuries. It also coexists alongside the Ulster dialect of the Irish (Gaelic) language, which also influenced the dialect.

The two major divisions of Ulster English are Mid-Ulster English, the most widespread variety, and Ulster Scots English, spoken in much of northern County Antrim along a continuum with the Scots language. South Ulster English is a geographically transitional dialect between Mid-Ulster English and English spoken south of Ulster, in the Republic of Ireland.

The British Islands is a term within the law of the United Kingdom which refers collectively to the following four polities:

• the United Kingdom of Great Britain and Northern Ireland (which includes England, Scotland, Wales and Northern Ireland);
• the Bailiwick of Guernsey (including the jurisdictions of Alderney, Guernsey and Sark);
• the Bailiwick of Jersey;
• the Isle of Man.

These polities constitute the principal geopolitical and territorial nucleus of British sovereignty. Distinguished from the British Overseas Territories, which are remnants of the former British Empire, the British Islands represent the core legal and constitutional realm under the direct jurisdiction of The Crown and Parliament of the United Kingdom (i.e. United Kingdom proper), albeit with varying degrees of self-governance among the Crown Dependencies. A statutory definition of the term British Islands can be found in Schedule 1 of the Interpretation Act 1978.