The British Parliamentary system is a form of government where the executive branch derives its legitimacy from and is accountable to the legislature, known as Parliament. This system is characterized by a fusion of powers, meaning that the Prime Minister and their cabinet are typically members of Parliament, specifically from the House of Commons. Parliament consists of two houses: the House of Commons, which is made up of elected representatives, and the House of Lords, which includes appointed and hereditary members. The Prime Minister leads the government and is usually the leader of the majority party in the House of Commons.