text:  We have an election every five years. Unlike in the US, we have one elected legislature, the House of Commons. It has 650 seats, most of them in England, but some in Scotland and Wales and Northern Ireland. And that really is 650 mini elections because it's a first-past-the-post system. Each MP has to win in their seat and then all the MPs come to Parliament and they can then select the Prime Minister from amongst themselves.