Hiến Pháp Anh Quốc

The UK does not have a single written document called "the constitution." Instead, it has an uncodified constitution drawn from multiple sources.

The four key sources are: Acts of Parliament (statutes) — laws passed by Parliament, the highest form of law due to parliamentary sovereignty; conventions — unwritten rules followed by tradition (e.g. the monarch always grants Royal Assent to Bills); royal prerogatives — powers historically belonging to the monarch, now mostly exercised by ministers (declaring war, signing treaties, granting honours); and common law — legal principles established by judges through court decisions over centuries.

Several key documents have shaped the constitution. The Magna Carta (1215) established that even the king is subject to the law. The Bill of Rights (1689) limited the monarch's powers and confirmed Parliament's rights. The Acts of Union joined England and Scotland (1707) and Great Britain and Ireland (1801). The Human Rights Act 1998 incorporated the European Convention on Human Rights into UK law. The Scotland Act 1998 devolved powers to Scotland.

Parliamentary sovereignty is central to the constitution. It means Parliament can pass any law, no court can overrule an Act of Parliament, and no Parliament can bind a future Parliament. This makes Parliament the supreme legal authority in the UK.