The United Kingdom has three distinctly different legal systems, each of which derives from a particular geographical area for a variety of historical reasons: English law, Scots law, Northern Ireland law, and, since 2007, calls for a fourth type, that of purely Welsh law as a result of Welsh devolution, with further calls for a Welsh justice system.
English law is the common law legal system of England and Wales, comprising mainly criminal law and civil law, each branch having its own courts and procedures. The judiciary is independent, and legal principles like fairness, equality before the law, and the right to a fair trial are foundational to the system.
The Lord Chancellor, formally titled Lord High Chancellor of Great Britain, is a senior minister of the Crown within the Government of the United Kingdom. The lord chancellor is the minister of justice for England and Wales and the highest-ranking Great Officer of State in Scotland and England, nominally outranking the prime minister. The lord chancellor is appointed and dismissed by the sovereign on the advice of the prime minister. Prior to the union of England and Scotland into the Kingdom of Great Britain, there were separate lord chancellors for the Kingdom of England and the Kingdom of Scotland. Likewise, the Lordship of Ireland and its successor states maintained the office of lord chancellor of Ireland until the establishment of the Irish Free State in 1922, whereupon the office was abolished.
The Courts of England and Wales, supported administratively by His Majesty's Courts and Tribunals Service, are the civil and criminal courts responsible for the administration of justice in England and Wales.
The High Court of Justiciary is the supreme criminal court in Scotland. The High Court is both a trial court and a court of appeal. As a trial court, the High Court sits on circuit at Parliament House or in the adjacent former Sheriff Court building in the Old Town in Edinburgh, or in dedicated buildings in Glasgow and Aberdeen. The High Court sometimes sits in various smaller towns in Scotland, where it uses the local sheriff court building. As an appeal court, the High Court sits only in Edinburgh. On one occasion the High Court of Justiciary sat outside Scotland, at Zeist in the Netherlands during the Pan Am Flight 103 bombing trial, as the Scottish Court in the Netherlands. At Zeist the High Court sat both as a trial court, and an appeal court for the initial appeal by Abdelbaset al-Megrahi.
The Constitutional Reform Act 2005 is an Act of the Parliament of the United Kingdom, relevant to UK constitutional law. It provides for a Supreme Court of the United Kingdom to take over the previous appellate jurisdiction of the Law Lords as well as some powers of the Judicial Committee of the Privy Council, and removed the functions of Speaker of the House of Lords and Head of the Judiciary of England and Wales from the office of Lord Chancellor.
The courts of Scotland are responsible for administration of justice in Scotland, under statutory, common law and equitable provisions within Scots law. The courts are presided over by the judiciary of Scotland, who are the various judicial office holders responsible for issuing judgments, ensuring fair trials, and deciding on sentencing. The Court of Session is the supreme civil court of Scotland, subject to appeals to the Supreme Court of the United Kingdom, and the High Court of Justiciary is the supreme criminal court, which is only subject to the authority of the Supreme Court of the United Kingdom on devolution issues and human rights compatibility issues.
The Supreme Court of the United Kingdom is the final court of appeal in the United Kingdom for all civil cases and for criminal cases originating in England, Wales and Northern Ireland. 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.
The courts of Northern Ireland are the civil and criminal courts responsible for the administration of justice in Northern Ireland: they are constituted and governed by the law of Northern Ireland.
The Inner House is the senior part of the Court of Session, the supreme civil court in Scotland; the Outer House forms the junior part of the Court of Session. It is a court of appeal and a court of first instance. The chief justice is the Lord President, with their deputy being the Lord Justice Clerk, and judges of the Inner House are styled Senators of the College of Justice or Lords of Council and Session. Criminal appeals in Scotland are handled by the High Court of Justiciary sitting as the Court of Appeal.
The Judicial Appointments Commission (JAC) is an independent commission that selects candidates for judicial office in courts and tribunals in England and Wales and for some tribunals whose jurisdiction extends to Scotland or Northern Ireland.
There are various levels of judiciary in England and Wales—different types of courts have different styles of judges. They also form a strict hierarchy of importance, in line with the order of the courts in which they sit, so that judges of the Court of Appeal of England and Wales are given more weight than district judges sitting in county courts and magistrates' courts. On 1 April 2020 there were 3,174 judges in post in England and Wales. Some judges with United Kingdom-wide jurisdiction also sit in England and Wales, particularly Justices of the United Kingdom Supreme Court and members of the tribunals judiciary.
In most legal jurisdictions, a supreme court, also known as a court of last resort, apex court, and highcourt of appeal, and court of final appeal, is the highest court within the hierarchy of courts. Broadly speaking, the decisions of a supreme court are binding on all other courts in a nation and are not subject to further review by any other court. Supreme courts typically function primarily as appellate courts, hearing appeals from decisions of lower trial courts, or from intermediate-level appellate courts. A supreme court can also, in certain circumstances, act as a court of original jurisdiction.
The Ministry of Justice (MoJ) is a ministerial department of the Government of the United Kingdom. It is headed by the Secretary of State for Justice and Lord Chancellor. Its stated priorities are to reduce re-offending and protect the public, to provide access to justice, to increase confidence in the justice system, and to uphold people's civil liberties. The Secretary of State is the minister responsible to Parliament for the judiciary, the court system, prisons, and probation in England and Wales, with some additional UK-wide responsibilities, e.g., the UK Supreme Court and judicial appointments by the Crown. The department is also responsible for areas of constitutional policy not transferred in 2010 to the Deputy Prime Minister, human rights law, and information rights law across the UK.
In the United Kingdom, a tribunal is a specialist court with jurisdiction over a certain area of civil law. They are generally designed to be more informal and accessible than 'traditional' courts.
The constitution of the United Kingdom comprises the written and unwritten arrangements that establish the United Kingdom of Great Britain and Northern Ireland as a political body. Unlike in most countries, no official attempt has been made to codify such arrangements into a single document, thus it is known as an uncodified constitution. This enables the constitution to be easily changed as no provisions are formally entrenched.
Justices of the Supreme Court of the United Kingdom are the judges of the Supreme Court of the United Kingdom other than the president and the deputy president of the court. The Supreme Court is the highest court of the United Kingdom for all civil cases, and for criminal cases from the jurisdictions of England and Wales and Northern Ireland. Judges are appointed by the British monarch on the advice of the prime minister, who receives recommendations from a selection commission.
Scots law is the legal system of Scotland. It is a hybrid or mixed legal system containing civil law and common law elements, that traces its roots to a number of different historical sources. Together with English law and Northern Irish law, it is one of the three legal systems of the United Kingdom. Scots law recognises four sources of law: legislation, legal precedent, specific academic writings, and custom. Legislation affecting Scotland and Scots law is passed by the Scottish Parliament on all areas of devolved responsibility, and the United Kingdom Parliament on reserved matters. Some legislation passed by the pre-1707 Parliament of Scotland is still also valid.
His Majesty's Courts and Tribunals Service (HMCTS) is an executive agency of the Ministry of Justice. It was created on 1 April 2011 by the merger of Her Majesty's Courts Service and the Tribunals Service.
Federalism in the United Kingdom aims at constitutional reform to achieve a federal UK or a British federation, where there is a division of legislative powers between two or more levels of government, so that sovereignty is decentralised between a federal government and autonomous governments in a federal system.
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