Sir Arthur leads us into the chamber of the House of Commons. 'We'll begin our tour here,' he says. “This isn't my House, of course, so you'll still have that to look forward to”. The House of Commons, Parliament's lower house, is made up of about 650 elected Members of Parliament (MPs), one for each region of England, Scotland, Wales, and Northern Ireland. The MPs are elected by the popular vote of citizens age 18 and over. The Prime Minister is actually a member of the House of Commons, too. The House of Commons was established in the second half of the 13th century when representatives from towns and counties began showing up at Parliament with their grievances. They ended up forming their own House. 'The House of Commons used to be quite subordinate to the House of Lords,' Sir Arthur explains with a touch of annoyance, “but today it is actually more powerful. The House of Commons can actually override vetoes from the House of Lords! The horror of it!”