Isle of Man in the context of Emain Ablach

The British Isles are an archipelago in the North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner and Outer Hebrides, the Northern Isles (Orkney and Shetland), and over six thousand smaller islands. They have a total area of 315,159 km (121,684 sq mi) and a combined population of almost 75 million, and include two sovereign states, the Republic of Ireland (which covers roughly five-sixths of Ireland) and the United Kingdom of Great Britain and Northern Ireland. The Channel Islands, off the north coast of France, are normally taken to be part of the British Isles, even though geographically they do not form part of the archipelago. Under the UK Interpretation Act 1978, the Channel Islands are clarified as forming part of the British Islands, not to be confused with the British Isles.

The oldest rocks are 2.7 billion years old and are found in Ireland, Wales and the north-west of Scotland. During the Silurian period, the north-western regions collided with the south-east, which had been part of a separate continental landmass. The topography of the islands is modest in scale by global standards. Ben Nevis, the highest mountain, rises to only 1,345 metres (4,413 ft), and Lough Neagh, which is notably larger than other lakes in the island group, covers 390 square kilometres (151 sq mi). The climate is temperate marine, with cool winters and warm summers. The North Atlantic drift brings significant moisture and raises temperatures 11 °C (20 °F) above the global average for the latitude. This led to a landscape that was long dominated by temperate rainforest, although human activity has since cleared the vast majority of forest cover. The region was re-inhabited after the last glacial period of Quaternary glaciation, by 12,000 BC, when Great Britain was still part of a peninsula of the European continent. Ireland was connected to Great Britain by the British-Irish Ice Sheet before 14,000 BC, and was not inhabited until after 8000 BC. Great Britain became an island by 7000 BC with the flooding of Doggerland.

The Kingdom of Great Britain, officially Great Britain, was a sovereign state in Western Europe from 1707 to the end of 1800. The state was created by the 1706 Treaty of Union and ratified by the Acts of Union 1707, which united the Kingdom of England (including Wales) and the Kingdom of Scotland to form a single kingdom encompassing the whole island of Great Britain and its outlying islands, with the exception of the Isle of Man and the Channel Islands. The unitary state was governed by a single parliament at the Palace of Westminster, but the distinct legal systems—English law and Scots law—remained in use, as did distinct educational systems and religious institutions, namely the Church of England and the Church of Scotland remaining as the national churches of England and Scotland respectively.

The formerly separate kingdoms had been in personal union since the Union of the Crowns in 1603 when James VI of Scotland became King of England and King of Ireland. Since the reign of James, who had been the first to refer to himself as "king of Great Britain", a political union between the two mainland British kingdoms had been repeatedly attempted and aborted by both the Parliament of England and the Parliament of Scotland. Queen Anne (r. 1702–1714) did not produce a clear Protestant heir and endangered the line of succession, with the laws of succession differing in the two kingdoms and threatening a return to the throne of Scotland of the Roman Catholic House of Stuart, exiled in the Glorious Revolution of 1688.

The Gaels (/ɡeɪlz/ GAYLZ; Irish: Na Gaeil [n̪ˠə ˈɡeːlʲ]; Scottish Gaelic: Na Gàidheil [nə ˈkɛː.al]; Manx: Ny Gaeil [nə ˈɡeːl]) are an Insular Celtic ethnic group native to Ireland, Scotland, and the Isle of Man, and historically, Iceland and the Faroe Islands. They are associated with the Gaelic languages: a branch of the Celtic languages comprising Irish, Manx, and Scottish Gaelic.

Gaelic language and culture originated in Ireland, extending to Dál Riata in western Scotland. In antiquity, the Gaels traded with the Roman Empire and also raided Roman Britain. In the Middle Ages, Gaelic culture became dominant throughout the rest of Scotland and the Isle of Man. There was also some Gaelic settlement in Wales, as well as cultural influence through Celtic Christianity. In the Viking Age, small numbers of Vikings raided and settled in Gaelic lands, becoming the Norse-Gaels. In the 9th century, Dál Riata and Pictland merged to form the Gaelic Kingdom of Alba (Scotland). Meanwhile, Gaelic Ireland was made up of several kingdoms, with a High King often claiming lordship over them.

Castletown (Manx: Balley y Chashtal, pronounced [ˈbalʲə ˈxaʃtʃəl]) is a town in the Isle of Man, geographically within the historical parish of Malew but administered separately. Lying at the south of the island, it was the Manx capital until 1869. The centre of town is dominated by Castle Rushen, a well-preserved medieval castle, originally built for a Viking king.

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.

The visa policy of Ireland is set by the Government of Ireland and determines visa requirements for foreign citizens. If someone other than a European Union, EFTA or Common Travel Area citizen seeks entry to Ireland, they must be a national of a visa-exempt country or have a valid Irish visa issued by one of the Irish diplomatic missions around the world.

Although Ireland is a member of the European Union, it is not part of the Schengen Area and therefore sets its own visa policy. Ireland also operates the Common Travel Area with the United Kingdom, the Channel Islands and the Isle of Man which specifies open borders between the countries and territories. Established in 1923, it permits British and Irish citizens freedom of movement around the Common Travel Area and to cross its borders with minimal or no identity documents.

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.

The North Channel (known in Irish and Scottish Gaelic as Sruth na Maoile, in Scots as the Sheuch) is the strait between north-eastern Ireland and south-western Scotland. The Firth of Clyde merges with the channel, between the southern tip of the Kintyre peninsula and Corsewall Point on the Rhins of Galloway. Part of the Irish Sea, the channel begins north of the Isle of Man and runs north-west into the Atlantic Ocean. Within the channel is Beaufort's Dyke, the deepest part of which is 312 metres (1,024 ft).

The Irish Sea is a 46,007 km (17,763 sq mi) body of water that separates the islands of Ireland and Great Britain. It is linked to the Celtic Sea in the south by St George's Channel and to the Inner Seas off the West Coast of Scotland in the north by the North Channel. Anglesey, North Wales, is the largest island in the Irish Sea, followed by the Isle of Man. The term Manx Sea may occasionally be encountered (Welsh: Môr Manaw, Irish: Muir Meann Manx: Mooir Vannin, Scottish Gaelic: Muir Mhanainn).

On its shoreline are Scotland to the north, England to the east, Wales to the southeast, Northern Ireland and the Republic of Ireland to the west. The Irish Sea is of significant economic importance to regional trade, shipping and transport, as well as fishing and power generation in the form of wind power and nuclear power plants. Annual traffic between Great Britain and Ireland is over 12 million passengers and 17 million tonnes (17,000,000 long tons; 19,000,000 short tons) of traded goods.

This article is a list of some of the islands that form the British and Irish Isles that have an area of 1 square kilometre (247 acres) or larger, listing area and population data. The total area of the islands is 314,965 km (121,609 sq mi). Great Britain accounts for the larger part of this area at 66%, with Ireland accounting for 26%, leaving the remaining 8%—an area of 23,996 km (9,265 sq mi)—consisting of thousands of smaller islands. The largest of the other islands are to be found in the Hebrides and the Northern Isles to the north, and Anglesey and the Isle of Man between Great Britain and Ireland. Not included are the Channel Islands which, positioned off the coast of France, are not part of the archipelago.

There are 188 permanently inhabited islands in total:

The Norse–Gaels (Old Irish: Gall-Goídil; Irish: Gall-Ghaeil; Scottish Gaelic: Gall-Gàidheal; Manx: Goal-Gael, 'foreigner-Gaels') were a people of mixed Gaelic and Norse ancestry and culture. They emerged in the Viking Age, when Vikings who settled in Ireland and in Scotland became Gaelicised and intermarried with Gaels. The Norse–Gaels dominated much of the Irish Sea and Scottish Sea regions from the 9th to 12th centuries. They founded the Kingdom of the Isles (which included the Hebrides and the Isle of Man), the Kingdom of Dublin, the Lordship of Galloway (which is named after them), and briefly ruled the Kingdom of York (939–944 AD). The most powerful Norse–Gaelic dynasty were the Uí Ímair or Ivar dynasty.

Over time, the Norse–Gaels became ever more Gaelicised and disappeared as a distinct group. However, they left a lasting influence, especially in the Isle of Man and Outer Hebrides, where most placenames are of Norse–Gaelic origin. Several Scottish clans have Norse–Gaelic roots, such as Clan MacDonald, Clan MacDougall and Clan MacLeod. The elite mercenary warriors known as the gallowglass (gallóglaigh) emerged from these Norse–Gaelic clans and became an important part of Irish warfare. The Viking longship also influenced the Gaelic birlinn and longa fada, which were used extensively until the 17th century. Norse–Gaelic surnames survive today and include MacIvor, MacAskill, and [Mac]Cotter.

The Channel Islands are an archipelago in the English Channel, off the French coast of Normandy. They are divided into two Crown Dependencies: the Bailiwick of Jersey, which is the largest of the islands; and the Bailiwick of Guernsey, consisting of Guernsey, Alderney, Sark, Herm and some smaller islands. Historically, they are the remnants of the Duchy of Normandy.

Although they are not part of the United Kingdom, the UK is responsible for the defence and international relations of the islands as it is for the other Crown Dependency, the Isle of Man, and the British Overseas Territories. The Crown Dependencies are neither members of the Commonwealth of Nations, nor part of the European Union. They have a total population of about 171,916, and the bailiwicks' capitals, Saint Helier and Saint Peter Port, have populations of 33,500 and 18,207 respectively.

British literature is a body of literature from the United Kingdom of Great Britain and Northern Ireland, the Isle of Man, and the Channel Islands. This article covers British literature in the English language. Anglo-Saxon (Old English) literature is included, and there is some discussion of Anglo-Latin and Anglo-Norman literature, where literature in these languages relate to the early development of the English language and literature. There is also some brief discussion of major figures who wrote in Scots, but the main discussion is in the various Scottish literature articles.

The article Literature in the other languages of Britain focuses on the literatures written in the other languages that are, and have been, used in Britain. There are also articles on these various literatures: Latin literature in Britain, Anglo-Norman, Cornish, Guernésiais, Jèrriais, Latin, Manx, Scottish Gaelic, Welsh, etc.

A chief minister is an elected or appointed head of government of – in most instances – a sub-national entity, for instance an administrative subdivision or federal constituent entity. Examples include a state (and sometimes a union territory) in India; a territory of Australia; a province of Sri Lanka or Pakistan; a federal province in Nepal; an autonomous region of Philippines; or a British Overseas Territory that has attained self-governance. It is also used as the English version of the title given to the heads of governments of the Malay states without a monarchy.

The title is also used in the Crown Dependencies of the Isle of Man (since 1986), in Guernsey (since 2004), and in Jersey (since 2005).

Tanistry was a system of inheritance practised by the Gaelic nobilities of Ireland, the Isle of Man, and parts of modern Scotland. It was distinctive in having an elected heir known as the tanist (Irish: tánaiste; Scottish Gaelic: tànaiste; Manx: tanishtey). This system was used to select the Chiefs of the Name (head of a clan) and the rulers of the various Gaelic kingdoms in Ireland and in Scotland.

When the chief or king died they were immediately succeeded by the tanist, who had typically been elected years earlier. A new election was then held to select the next tanist. This differs from other systems of elective inheritance, in that an heir was elected in advance of a vacancy, not after the vacancy arose. Valid candidates for the election were restricted to male members of the title holder's sept (extended family); the exact eligibility criteria differed between Ireland and Scotland. The electorate was identical to the set of valid candidates i.e. potential heirs would select a tanist from among themselves.

Fell (from Old Norse: fell, "mountain → landscape over the tree line"; cf. Icelandic: fell, Norwegian: fjell, Swedish: fjäll) is a high and barren landscape feature, such as a mountain or moor-covered hill, often mountain landscape over the tree line, etc. The term is most often employed in Fennoscandia, Iceland, the Isle of Man, parts of northern England, and Scotland.

Manx (endonym: Gaelg, y Ghaelg or Gailck, y Ghailck, pronounced [ɡilʲkʲ, ə ˈɣilʲkʲ]),also known as Manx Gaelic, is a Gaelic language of the insular Celtic branch of the Celtic language family, itself a branch of the Indo-European language family. Manx is the heritage language of the Manx people.

Although few children native to the Isle of Man speak Manx as a first language, there has been a steady increase in the number of speakers since 1974, when Ned Maddrell, considered the last speaker to grow up in a Manx-speaking community environment, died. Despite this, the language has never fallen completely out of use, with a minority having some knowledge of it as a heritage language, and it is still an important part of the island's culture and cultural heritage.

The Crown Dependencies are three offshore island territories in the British Isles that are self-governing possessions of the British Crown: the Bailiwick of Guernsey, the Bailiwick of Jersey (together known as the Channel Islands), and the Isle of Man.

They are closely related to the United Kingdom (UK), although they are not part of it. They have the status of "territories for which the United Kingdom is responsible", rather than sovereign states. As a result, they are not member states of the Commonwealth of Nations. However, they do have relationships with the Commonwealth and other international organisations, and are members of the British–Irish Council. They have their own teams in the Commonwealth Games.