The House of Lords established that courts cannot inquire into Parliament's internal procedures when passing Acts, reinforcing the enrolled bill rule and parliamentary sovereignty.

This early case established that the Crown cannot create new crimes or alter the law by proclamation alone, requiring parliamentary consent for changes to the common law.

UK courts cannot review the validity of Acts of Parliament, even when they allegedly breach international obligations or affect other countries' constitutional arrangements.

The House of Lords reaffirmed that courts cannot question the validity of Acts of Parliament, reinforcing the enrolled bill rule and parliamentary sovereignty in modern constitutional law.

The Case of Proclamations established that the King cannot create new law or change existing law through royal proclamation alone. This landmark case confirmed that royal prerogative powers are limited and cannot override statute or common law without parliamentary consent.

Supreme Court case clarifying the limits of parliamentary privilege, holding that MPs' expenses claims are not protected by Article IX of the Bill of Rights 1689.

When Parliament provides a statutory scheme for government action, ministers cannot bypass it by relying on broader prerogative powers.

Market traders challenged convictions for using imperial measures, arguing the Weights and Measures Act 1985 was impliedly repealed by EC law. The Divisional Court held that the European Communities Act 1972 was a constitutional statute that could not be impliedly repealed, establishing the doctrine of constitutional statutes in UK law.

UK courts can disapply conflicting domestic legislation and grant interim relief against the Crown when EU law supremacy is at stake.

This case established that the Crown and government ministers can be subject to contempt of court proceedings and injunctive relief. It arose when the Home Secretary was found in contempt for failing to comply with a court order regarding an asylum seeker's deportation.

The Home Secretary attempted to introduce a tariff scheme for criminal injuries compensation without implementing the statutory scheme Parliament had enacted. The House of Lords ruled this was an abuse of power, as ministers cannot use prerogative powers to frustrate the will of Parliament.

Government agents broke into John Entick's house and seized his papers under a warrant issued by the Secretary of State. The court ruled this was unlawful, establishing that government power must have legal authority and that every invasion of private property must be justified by law.

House of Lords allows courts to consult Hansard for statutory interpretation

House of Lords held that local authorities must act reasonably and cannot ignore their fiduciary duty to ratepayers when setting wages, establishing early principles of Wednesbury unreasonableness.

House of Lords held that GLC's 'Fares Fair' policy of subsidising public transport through supplementary rates was ultra vires as it breached fiduciary duty to ratepayers.

This case established when prisoners have a right to an oral hearing before the Parole Board under common law fairness principles and Article 5(4) ECHR. The Supreme Court clarified that procedural fairness requires consideration of individual circumstances, not blanket policies denying hearings.

The House of Lords established the fundamental principle that judges must not have any financial interest in cases they decide, creating the rule against pecuniary bias.

Court of Common Pleas established that natural justice requires a hearing before a person is deprived of their property or rights, even where not expressly required by statute.

House of Lords confirms EU law supremacy over UK Acts of Parliament

Court of Appeal established the fundamental principle that justice must not only be done but must manifestly be seen to be done.

The Court of Appeal held that later Acts of Parliament impliedly repeal earlier conflicting provisions, establishing the doctrine of implied repeal in parliamentary sovereignty.

House of Lords rules prerogative powers subject to judicial review

This case established the famous 'Wednesbury unreasonableness' test for judicial review of administrative decisions. It set the standard that courts can only overturn administrative decisions if they are so unreasonable that no reasonable authority could have reached them.

John MacCormick challenged the Queen's title as 'Elizabeth II' in Scotland, arguing Elizabeth I never reigned there. The Court of Session held that while courts cannot question the validity of Acts of Parliament, certain constitutional arrangements may be justiciable, though this particular claim failed.

Judges must be independent and appear independent; undisclosed interests invalidate judicial decisions.

Ratification of Maastricht Treaty a non-justiciable matter of high policy.

Private bodies exercising public functions can face judicial review

Courts can review admin decisions despite ouster clauses if jurisdictional error found

Government loses bid to suppress Cabinet minister's political diaries