Senior Courts of England and Wales

Her Majesty's Courts of Justice of England and Wales are the civil and criminal courts responsible for the administration of justice in England and Wales; they apply both English law and the law of England and Wales, and are established under Acts of the Parliament of the United Kingdom.

The United Kingdom does not have a single unified legal system—England and Wales have one system, Scotland another, and Northern Ireland a third. There are exceptions to this rule; for example in immigration law, the Asylum and Immigration Tribunal's jurisdiction covers the whole of the United Kingdom, while in employment law there is a single system of Employment Tribunals for England, Wales, and Scotland but not Northern Ireland. Additionally, the Military Court Service has jurisdiction over all members of the armed forces of the United Kingdom in relation to offences against military law.

The Court of Appeal, the High Court, the Crown Court, the Magistrates' Court, and the County Court are administered by Her Majesty's Courts and Tribunals Service, an executive agency of the Ministry of Justice.

The Supreme Court is the highest appeal court in almost all cases in England and Wales. Before the Constitutional Reform Act 2005 this role was held by the House of Lords. The Supreme Court is also the highest court of appeal for devolution matters, a role previously held by the Privy Council.