R (on the application of Miller)

R (on the application of Miller)

R (on the application of Miller) was a landmark constitutional law case decided by the Supreme Court of the United Kingdom in 2017 concerning the legal process for the United Kingdom to withdraw from the European Union under the Treaty on European Union. The decision addressed the interaction of prerogative powers, statutory rights derived from the European Communities Act 1972, and the role of Parliament, resolving a direct challenge that engaged institutions such as the Supreme Court, the Divisional Court, and political actors including the Prime Minister and Cabinet.

Background and facts

The claim was brought by Gina Miller and others challenging the United Kingdom Government's assertion that it could trigger Article 50 of the Treaty on European Union using royal prerogative powers exercised by the Prime Minister and Cabinet without an Act of Parliament. The Government relied on prerogative authority associated with foreign affairs and the Royal Prerogative to give notification under Article 50 TEU following the result of the 2016 referendum. Claimants argued that statutory rights established by the European Communities Act 1972 and settled by judgments such as Factortame could not be removed or altered without primary legislation. The Divisional Court in the High Court of Justice gave a decision that was appealed to the Supreme Court of the United Kingdom, drawing interest from institutions like Parliament of the United Kingdom, the Prime Minister's office, and devolved bodies including the Scottish Government.

Legal issues

The case raised questions about (1) the scope of the royal prerogative and prerogative powers in relation to withdrawal from international treaties such as the Treaty on European Union; (2) the interaction between prerogative powers and statutory rights created by the European Communities Act 1972; and (3) whether the exercise of prerogative powers to trigger Article 50 TEU would affect domestic rights without parliamentary authority, implicating constitutional principles developed through cases like R (Jackson) v Attorney General and statutory interpretation in light of decisions such as R v Secretary of State for the Home Department, ex p Simms.

Judgment and reasoning

The Supreme Court held by a majority that the Government could not trigger Article 50 using prerogative powers alone and that an Act of Parliament was required to authorise the giving of notification under Article 50 because the triggering would inevitably lead to changes in domestic law and the removal of rights conferred by the European Communities Act 1972. The Court drew on precedents including Entick v Carrington for limits of prerogative, and on the line of authority from R v Secretary of State for the Home Department, ex p Northumbria Police Authority and R v Jones (Margaret) regarding limits to prerogative and statutory rights. The majority emphasised parliamentary sovereignty as articulated in works such as A.V. Dicey and cases like British Railways Board v Pickin and identified that only Parliament could authorise such a radical change to domestic legal rights. Dissenting and concurring opinions by members of the bench referenced constitutional doctrines debated in R (Miller) No 2 and other prominent rulings from the House of Lords and the Supreme Court.

Significance and impact

The decision affirmed the constitutional principle that rights created by Parliament cannot be removed by the executive acting under prerogative powers, reinforcing doctrines associated with Parliamentary sovereignty and the role of the judiciary described in judgments such as R (Jackson) v Attorney General. It produced immediate political and legislative consequences for the Prime Minister and Parliament of the United Kingdom, leading to the passage of the European Union (Notification of Withdrawal) Act 2017 and influencing debates in the House of Commons and the House of Lords. The ruling has been cited in subsequent constitutional litigation and commentary involving devolved institutions like the Scottish Parliament, the Welsh Senedd, and administrative law disputes involving prerogative powers in areas touching on international obligations such as those under the European Convention on Human Rights.

Related cases and legal doctrine

The case is connected to a body of authority on prerogative and parliamentary supremacy including Entick v Carrington (1765), R (Jackson) v Attorney General, Factortame Ltd v Secretary of State for Transport (No 2), and R (Miller) No 2. It also interacts with treaty law principles reflected in cases concerning European Union law and domestic incorporation such as Costa v ENEL and debates from constitutional theorists like A.V. Dicey and Erskine May. Subsequent litigation and academic commentary have linked the judgment to disputes in Gibraltar, the European Court of Human Rights, and statutes such as the European Communities Act 1972 and the European Union (Withdrawal) Act 2018.

Category:2017 in United Kingdom law Category:Supreme Court of the United Kingdom cases