A report on Constitutional monarchy, Royal prerogative and Constitution

In most constitutional monarchies, prerogatives can be abolished by Parliament as the courts apply the constitutional near-absolute of the supremacy of Parliament.

Constitutional monarchy may refer to a system in which the monarch acts as a non-party political head of state under the constitution, whether written or unwritten.

Instead, the British Parliament and the Government – chiefly in the office of Prime Minister of the United Kingdom – exercise their powers under "Royal (or Crown) Prerogative": on behalf of the monarch and through powers still formally possessed by the monarch.

The constitution of a Commonwealth realm may also sharply limit the prerogative.

It led to the system of Constitutional Monarchy, with further reforms shifting the balance of power from the monarchy and nobility to the House of Commons.

By contrast to codified constitutions, uncodified constitutions include both written sources – e.g. constitutional statutes enacted by the Parliament – and unwritten sources – constitutional conventions, observation of precedents, royal prerogatives, customs and traditions, such as holding general elections on Thursdays; together these constitute British constitutional law.