求关于英国政治制度的英文介绍其内容要设及英国的君主立宪制,英国的私法,立法,和行政

The United Kingdom of Great Britain and Northern Ireland[13] (commonly known as the United Kingdom, the UK, or Britain)[14] is a sovereign state located off the northwestern coast of continental Europe. It is an island country,[15][16] spanning an archipelago including Great Britain, the northeastern part of Ireland, and many small islands. Northern Ireland is the only part of the UK with a land border, sharing it with the Republic of Ireland.[17][18] Apart from this land border, the UK is surrounded by the Atlantic Ocean, the North Sea, the English Channel and the Irish Sea. The largest island, Great Britain, is linked to France by the Channel Tunnel.
The United Kingdom is a constitutional monarchy and unitary state consisting of four countries: England, Northern Ireland, Scotland and Wales.[19] It is governed by a parliamentary system with its seat of government in London, the capital, but with three devolved national administrations in Belfast, Cardiff and Edinburgh, the capitals of Northern Ireland, Wales and Scotland respectively. The Channel Island bailiwicks of Jersey and Guernsey, and the Isle of Man are Crown Dependencies and not part of the UK.[20] The UK has fourteen overseas territories,[21] all remnants of the British Empire, which at its height in 1922 encompassed almost a quarter of the world's land surface, the largest empire in history. British influence can continue to be observed in the language, culture and legal systems of many of its former colonies.
The UK is a developed country, with the world's sixth largest economy by nominal GDP and the seventh largest by purchasing power parity.[8] It was the world's first industrialised country[22] and the world's foremost power during the 19th and early 20th centuries,[23] but the economic cost of two world wars and the decline of its empire in the latter half of the 20th century diminished its leading role in global affairs. The UK nevertheless remains a major power with strong economic, cultural, military and political influence. It is a nuclear power and has the fourth highest defence spending in the world. It is a Member State of the European Union, holds a permanent seat on the United Nations Security Council, and is a member of the Commonwealth of Nations, G8, OECD, NATO, and the World Trade Organization
The United Kingdom is a constitutional monarchy: Queen Elizabeth II is head of state of the UK as well as of fifteen other Commonwealth countries, putting the UK in a personal union with those other states. The Crown has sovereignty over the Crown Dependencies of the Isle of Man and the Bailiwicks of Jersey and Guernsey, which are not part of the United Kingdom though the UK government manages their foreign affairs and defence and the UK Parliament has the authority to legislate on their behalf.
Since the United Kingdom is one of the three countries in the world today that does not have a codified constitution,[37] the Constitution of the United Kingdom consists mostly of written sources, including statutes, judge made case law, and international treaties. As there is no technical difference between ordinary statutes and "constitutional law," the UK Parliament can perform "constitutional reform" simply by passing Acts of Parliament and thus has the power to change or abolish almost any written or unwritten element of the constitution. However, no Parliament can pass laws that future Parliaments cannot change.[38]
The UK has a parliamentary government based on the Westminster system that has been emulated around the world — a legacy of the British Empire. The Parliament of the United Kingdom that meets in the Palace of Westminster has two houses: an elected House of Commons and an appointed House of Lords, and any Bill passed requires Royal Assent to become law. It is the ultimate legislative authority in the United Kingdom since the devolved parliament in Scotland and devolved assemblies in Northern Ireland, and Wales are not sovereign bodies and could be abolished by the UK parliament despite being established following public approval as expressed in referenda.

The Houses of ParliamentThe position of Prime Minister, the UK's head of government, belongs to the Member of Parliament who can obtain the confidence of a majority in the House of Commons, usually the current leader of the largest political party in that chamber. The Prime Minister and Cabinet are formally appointed by the Monarch to form Her Majesty's Government, though the Prime Minister chooses the Cabinet, and by convention HM The Queen respects the Prime Minister's choices. The Cabinet is traditionally drawn from members of the Prime Minister's party in both legislative houses, and mostly from the House of Commons, to which they are responsible. Executive power is exercised by the Prime Minister and Cabinet, all of whom are sworn into Her Majesty's Most Honourable Privy Council, and become Ministers of the Crown. The Rt Hon Gordon Brown MP, leader of the Labour Party, has been Prime Minister, First Lord of the Treasury and Minister for the Civil Service since 27 June 2007.[39]
For elections to the House of Commons, the UK is currently divided into 646 constituencies, with 529 in England, 18 in Northern Ireland, 59 in Scotland and 40 in Wales,[40] though this number will rise to 650 at the next General Election. Each constituency elects one Member of Parliament by simple plurality. General Elections are called by the Monarch when the Prime Minister so advises. Though there is no minimum term for a Parliament, the Parliament Act (1911) requires that a new election must be called within five years of the previous general election.
The UK's three major political parties are the Labour Party, the Conservative Party, and the Liberal Democrats, who won between them 616 out of the 646 seats available in the House of Commons at the 2005 general election. Most of the remaining seats were won by parties that only contest elections in one part of the UK such as the Scottish National Party (Scotland only), Plaid Cymru (Wales only), and the Democratic Unionist Party, Social Democratic and Labour Party, Ulster Unionist Party, and Sinn Féin (Northern Ireland only, though Sinn Féin also contests elections in Ireland). In accordance with party policy, no elected Sinn Féin Member of Parliament has ever attended the House of Commons to speak in the House on behalf of their constituents as Members of Parliament are required to take an oath of allegiance to the Monarch.[41]
For elections to the European Parliament, the UK currently has 78 MEPs, elected in 12 multi-member constituencies,[42] though this total will drop to 72 at the 2009 elections. Questions over sovereignty have been brought forward due to the UK's membership of the European Union
The United Kingdom does not have a single legal system due to it being created by the political union of previously independent countries with Article 19 of the Treaty of Union guaranteeing the continued existence of Scotland's separate legal system.[74] Today the UK has three distinct systems of law: English law, Northern Ireland law and Scots law. Recent constitutional changes will see a new Supreme Court of the United Kingdom come into being in October 2009 that will take on the appeal functions of the Appellate Committee of the House of Lords.[75] The Judicial Committee of the Privy Council, comprising the same members as the Appellate Committee of the House of Lords, is the highest court of appeal for several independent Commonwealth countries, the UK overseas territories, and the British crown dependencies.
参考资料：维基