• Constitutional law in the wide sense is a body of legal and political rules which concern the government of a country.

• A constitution in the narrow sense is a document or set of documents intentionally drafted to form the fundamental law of a country.

• Constitutions may be classified as written or unwritten, flexible or rigid, monarchical or republican, federal or unitary, supreme or subordinate to the legislature, or based on the separation of powers.

• The British Constitution is unwritten, flexible, monarchical, unitary, subordinate to the legislature, and based on a partial or a limited degree of separation of powers.