The constitution of the United Kingdom is an uncodified constitution made up of various statutes, judicial precedents, convention, treaties and other sources. Beginning in the Middle Ages, the constitution developed gradually in response to various crises. By the 20th century, the British monarchy had become a constitutional and ceremonial monarchy, and Parliament developed into a representative body exercising parliamentary sovereignty.
An Order in Council is a type of legislation in many countries, especially the Commonwealth realms. In the United Kingdom, this legislation is formally made in the name of the monarch by and with the advice and consent of the Privy Council (King-in-Council), but in other countries the terminology may vary. Orders-in-Council are distinct from Orders of Council, which are made in the name of the Council without sovereign approval.
A statutory instrument (SI) is the principal form in which delegated legislation is made in Great Britain.
The Scotland Act 1998 is an Act of the Parliament of the United Kingdom which legislated for the establishment of the devolved Scottish Parliament with tax varying powers and the Scottish Government. It was one of the most significant constitutional pieces of legislation to be passed by the UK Parliament between the passing of the European Communities Act in 1972 and the European Union (Withdrawal) Act in 2018 and is the most significant piece of legislation to affect Scotland since the Acts of Union in 1707 which ratified the Treaty of Union and led to the disbandment of the Parliament of Scotland.
Ratification is a principal's legal confirmation of an act of its agent. In international law, ratification is the process by which a state declares its consent to be bound to a treaty. In the case of bilateral treaties, ratification is usually accomplished by exchanging the requisite instruments, and in the case of multilateral treaties, the usual procedure is for the depositary to collect the ratifications of all states, keeping all parties informed of the situation.
Delegated legislation or secondary legislation in the United Kingdom is law that is not enacted by a legislative assembly such as the UK Parliament, but made by a government minister, a delegated person or an authorised body under powers given to them by an Act of Parliament.
In law, coming into force or entry into force is the process by which legislation, regulations, treaties and other legal instruments come to have legal force and effect. The term is closely related to the date of this transition. The point at which such instrument comes into effect may be set out in the instrument itself, or after the lapse of a certain period, or upon the happening of a certain event, such as a proclamation or an objective event, such as the birth, marriage, reaching a particular age or death of a certain person. On rare occasions, the effective date of a law may be backdated to a date before the enactment.
A Scottish statutory instrument is subordinate legislation made by the Scottish Ministers, as well as subordinate legislation made by public bodies using powers provided to be exercisable by Scottish statutory instrument. SSIs are the main form of subordinate legislation in Scotland, being used by default to exercise powers delegated to the Scottish Ministers, the Lord Advocate, the High Court of Justiciary, the Court of Session, and the King-in-Council.
The Ponsonby Rule was a constitutional convention in United Kingdom constitutional law that dictated that most international treaties had to be laid before Parliament 21 days before ratification.
Council of Civil Service Unions v Minister for the Civil Service[1984] UKHL 9, or the GCHQ case, is a United Kingdom constitutional law and UK labour law case that held the royal prerogative was subject to judicial review.
An Act of Parliament in the United Kingdom is primary legislation passed by the UK Parliament in Westminster, London.
The royal prerogative is a body of customary authority, privilege, and immunity attached to the British monarch, recognised in the United Kingdom. The monarch is regarded internally as the absolute authority, or "sole prerogative", and the source of many of the executive powers of the British government.
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.
The government of the United Kingdom, officially His Majesty's Government, abbreviated to HM Government, is the central executive authority of the United Kingdom of Great Britain and Northern Ireland. The government is led by the prime minister who selects all the other ministers. The country has had a Labour government since 2024. The prime minister Keir Starmer and his most senior ministers belong to the supreme decision-making committee, known as the Cabinet.
The Fixed-term Parliaments Act 2011 (FTPA) was an Act of the Parliament of the United Kingdom which, for the first time, set in legislation a default fixed election date for general elections in the United Kingdom. It remained in force until 2022, when it was repealed. Since then, as before its passage, elections are required by law to be held at least once every five years, but can be called earlier if the prime minister advises the monarch to exercise the royal prerogative to do so. Prime ministers have often employed this mechanism to call an election before the end of their five-year term, sometimes fairly early in it. Critics have said this gives an unfair advantage to the incumbent prime minister, allowing them to call a general election at a time that suits them electorally. While it was in force, the FTPA removed this longstanding power of the prime minister.
The royal prerogative is a body of customary authority, privilege, and immunity recognized in common law as belonging to the sovereign, and which have become widely vested in the government. It is the means by which some of the executive powers of government, possessed by and vested in a monarch with regard to the process of governance of the state, are carried out.
An Act of Adjournal is secondary legislation made by the High Court of Justiciary, the supreme criminal court of Scotland, to regulate the proceedings of Scottish courts hearing criminal matters. Now primarily derived from the Criminal Procedure (Scotland) Act 1995, the original power to create Acts of Adjournal is derived from an Act of the Parliament of Scotland in 1672. Before promulgation, Acts of Adjournal are reviewed and may be commented upon by the Criminal Courts Rules Council.
The Succession to the Crown Act 2013 is an Act of the Parliament of the United Kingdom that altered the laws of succession to the British throne in accordance with the 2011 Perth Agreement. The Act replaced male-preference primogeniture with absolute primogeniture for those in the line of succession born after 28 October 2011, which means the eldest child, regardless of gender, precedes any siblings. The Act also repealed the Royal Marriages Act 1772, ended disqualification of a person who married a Roman Catholic from succession, and removed the requirement for those outside the first six persons in line to the throne to seek the Sovereign's approval to marry. It came into force on 26 March 2015, at the same time as the other Commonwealth realms implemented the Perth Agreement in their own laws.
R (Miller) v Secretary of State for Exiting the European Union is a United Kingdom constitutional law case decided by the United Kingdom Supreme Court on 24 January 2017, which ruled that the British Government might not initiate withdrawal from the European Union by formal notification to the Council of the European Union as prescribed by Article 50 of the Treaty on European Union without an Act of Parliament giving the government Parliament's permission to do so. Two days later, the government responded by bringing to Parliament the European Union Act 2017 for first reading in the House of Commons on 26 January 2017. The case is informally referred to as "the Miller case" or "Miller I".
In 2011, the government of the United Kingdom acknowledged that a constitutional convention had developed whereby the House of Commons should have an opportunity to debate the matter before troops are committed. It said that it proposed to observe that convention except when there was an emergency and such action would not be appropriate.
