why is the british parliament known as the mother of parliaments
The mother of parliaments (expression) The expression is often applied to the Parliament of the United Kingdom because of the adoption of the Westminster model of parliamentary democracy by many countries of the former British Empire.[2][3][4]
Prime Minister of the United Kingdom Prior to 1902, the Prime Minister sometimes came from the House of Lords, provided that his government could form a majority in the Commons. However as the power of the aristocracy waned during the 19th century the convention developed that the Prime Minister should always sit in the lower house. As leader of the House of Commons, the Prime Minister's authority was further enhanced by the Parliament Act of 1911 which marginalised the influence of the House of Lords in the law-making process.