Parliamentary sovereignty in the United Kingdom

Parliamentary sovereignty in the United Kingdom. Parliamentary sovereignty, also called parliamentary supremacy, is a fundamental principle of the Constitution of the United Kingdom. It holds that the Parliament at Westminster has absolute legislative authority, being able to make or unmake any law on any subject. No person or body, including the courts, can override or set aside an Act of Parliament. This doctrine establishes Parliament as the supreme legal authority in the United Kingdom, a concept famously articulated by constitutional theorist A. V. Dicey.

History and development

The doctrine's foundations were laid during the English Civil War and the constitutional struggles of the 17th century, culminating in the Glorious Revolution of 1688. The Bill of Rights 1689 decisively established the supremacy of Parliament over the Crown, declaring that the suspension or execution of laws without parliamentary consent was illegal. Key historical affirmations include the Act of Settlement 1701 and the Acts of Union 1707, with the latter creating the new Parliament of Great Britain. The doctrine was further cemented by the Parliament Acts 1911 and 1949, which curtailed the power of the House of Lords, and was classically defined in the 19th century by A. V. Dicey in his work Introduction to the Study of the Law of the Constitution.

Key principles and legal basis

The core principle, as articulated by A. V. Dicey, is that Parliament can legislate on any matter whatsoever. This includes the power to alter constitutional arrangements, as seen in statutes like the Parliament Act 1911 and the European Communities Act 1972. Secondly, no Parliament can bind its successors, meaning all legislation can be repealed or amended by a future Parliament. Thirdly, no other body, including the Supreme Court of the United Kingdom, can question the validity of an Act of Parliament. The legal basis is largely common law, affirmed by landmark cases such as Edinburgh and Dalkeith Railway v Wauchope and British Railways Board v Pickin.

Limitations and challenges

While theoretically absolute, the doctrine faces practical and political limitations. The UK's membership in the European Union, facilitated by the European Communities Act 1972, created a significant challenge, as seen in the Factortame litigation where European Court of Justice rulings took precedence. Constitutional conventions, such as the Sewel convention concerning the Scottish Parliament, act as political restraints. Furthermore, the Human Rights Act 1998 empowers courts to issue declarations of incompatibility, and the Constitutional Reform Act 2005 strengthened judicial independence, creating a more assertive Judiciary of the United Kingdom.

Relationship with other constitutional doctrines

Parliamentary sovereignty interacts, and sometimes conflicts, with other constitutional principles. The doctrine of the rule of law, also championed by A. V. Dicey, requires government under law, creating a tension with Parliament's unlimited legislative power. The principle of separation of powers is modified by the UK's fused system, where the executive (Prime Minister and Cabinet) is drawn from the legislature. The sovereignty of Crown-in-Parliament is distinct from the personal prerogatives of the Monarch, whose powers are now exercised on ministerial advice.

Impact of devolution and international law

The devolution settlements established by the Scotland Act 1998, Government of Wales Act 2006, and Northern Ireland Act 1998 created devolved legislatures whose powers are legally subordinate to Westminster. However, politically, repealing these acts without consent is seen as untenable. International law, particularly through treaties like the European Convention on Human Rights and membership in the World Trade Organization, imposes obligations, but these only become domestic law through an Act of Parliament, such as the Human Rights Act 1998.

Contemporary debates and reform proposals

Contemporary debates focus on the doctrine's continuing relevance. The Brexit process, initiated by the European Union (Notification of Withdrawal) Act 2017 and the European Union (Withdrawal) Act 2018, was framed as a reassertion of parliamentary sovereignty. Some legal theorists, like Sir John Laws, argue for a "common law constitutionalism" where fundamental rights could limit Parliament. Proposals for a codified constitution, a British Bill of Rights, or further reform of the House of Lords would fundamentally alter the sovereignty model. The UK Internal Market Act 2020 and its interaction with the Northern Ireland Protocol continue to test the boundaries of parliamentary authority in a post-European Union context.

Category:Constitution of the United Kingdom Category:British law Category:Parliament of the United Kingdom