Prime Minister of the United Kingdom the incumbent is consistently ranked as one of the most powerful and influential people in the world. The Prime Minister is the head of the United Kingdom government. As such, the modern Prime Minister leads the Cabinet (the Executive). In addition, the Prime Minister leads a major political party and generally commands a majority in the House of Commons (the lower House of the legislature). The incumbent wields both significant legislative and executive powers. Under the British system, there is a unity of powers rather than separation. In the House of Commons, the Prime Minister guides the law-making process with
Government of the United Kingdom of supply (by voting through the government's budgets) and to pass primary legislation. By convention, if a government loses the confidence of the House of Commons it must either resign or a General Election is held. The support of the Lords, while useful to the government in getting its legislation passed without delay, is not vital. A government is not required to resign even if it loses the confidence of the Lords and is defeated in key votes in that House. The House of Commons is thus the Responsible house. The prime minister is held to account during Prime Minister's