R (Miller) v Secretary of State for Exiting the European Union

R (Miller) v Secretary of State for Exiting the European Union
source
Name	R (Miller) v Secretary of State for Exiting the European Union
Court	Supreme Court of the United Kingdom
Date decided	24 January 2017
Full name	R (on the application of Miller and another) v Secretary of State for Exiting the European Union
Citations	[2017] UKSC 5

R (Miller) v Secretary of State for Exiting the European Union was a landmark constitutional law case decided by the Supreme Court of the United Kingdom in January 2017. The case centered on whether the UK Government could use prerogative powers to initiate Article 50 and begin the United Kingdom's withdrawal from the European Union without an Act of Parliament. The court's ruling affirmed the necessity of parliamentary authorization, reinforcing the principle of parliamentary sovereignty and shaping the political process for Brexit negotiations.

Background

The legal dispute arose following the 2016 referendum, where a majority voted to leave the European Union. The Prime Minister, Theresa May, and her government argued that the historic prerogative power to conduct foreign affairs and make treaties allowed them to trigger Article 50 without a specific Act of Parliament. The claimant, Gina Miller, a businesswoman and activist, initiated judicial review proceedings, contending that such action would unlawfully remove rights established by the European Communities Act 1972. She was supported by other parties, including Deir dos Santos, and the case was fast-tracked directly from the High Court to the Supreme Court of the United Kingdom.

The case

The core legal question was whether the executive could use prerogative powers to nullify domestic rights created by an Act of Parliament, specifically the European Communities Act 1972. The government's case, presented by the Attorney General, Jeremy Wright, relied on precedent and the conduct of international relations. The appellants, represented by Lord Pannick, argued that only Parliament could authorize such a fundamental change. The Supreme Court heard appeals from the High Court's ruling in favor of Gina Miller, with interventions from the Scottish Government and the Attorney General for Northern Ireland.

Judgment

On 24 January 2017, the Supreme Court, led by Lord Neuberger, delivered its judgment by an 8-3 majority. The court held that the government could not trigger Article 50 without an Act of Parliament, as doing so would extinguish rights granted by the European Communities Act 1972. The ruling firmly upheld the constitutional principle of parliamentary sovereignty over the executive prerogative. A separate, unanimous ruling determined that the UK Government was not legally required to consult the devolved legislatures, such as the Scottish Parliament or the National Assembly for Wales, before initiating withdrawal.

Aftermath and impact

In direct response to the judgment, the government introduced the European Union (Notification of Withdrawal) Act 2017. This short Act of Parliament passed through the House of Commons and the House of Lords, receiving royal assent in March 2017, thereby granting the Prime Minister the authority to notify the European Council under Article 50. The case cemented the role of the Supreme Court in resolving major constitutional disputes and intensified political debates about the balance of power between the executive, Parliament, and the judiciary.

Significance

The case is a foundational precedent in British constitutional law, clearly delineating the limits of prerogative power in the face of statutory rights. It reaffirmed the centrality of parliamentary sovereignty as the ultimate principle of the UK's uncodified constitution. The ruling also highlighted the growing influence of the Supreme Court in political matters, setting the stage for subsequent litigation, including R (Miller) v The Prime Minister and the case on the prorogation of Parliament in 2019.