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.

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

Ministers cannot use prerogative powers to frustrate Parliament's statutory scheme

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.

Courts cannot invalidate Acts of Parliament regardless of international law breaches.

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

Statutory schemes override prerogative powers in the same field.

House of Lords rules prerogative powers subject to judicial review

EU law supremacy requires domestic courts to disapply conflicting national legislation.

Ministers cannot adopt blanket policies that fetter discretionary statutory powers.

Ministers cannot refuse to exercise statutory powers for improper purposes

House of Lords clarifies crucial distinction between trusts and powers

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

House of Lords establishes equality principle in divorce financial settlements

Home Secretary cannot abuse statutory powers to punish lawful licence purchases

House of Lords allows courts to consult Hansard for statutory interpretation