When the door closes on one prime minister's rule, what happens next? General elections are only one possible way to enter 10 Downing Street. Using all relevant constitutional conventions, precedents, non-legal codes, historical events, and laws, this title offers a comprehensive account of all the circumstances in which the premiership is attained and lost.Over seven chapters, this book follows the sequence of events starting with how a prime minister can lose office, continues on to examine the procedures that then have to be followed, and considers at length the ways in which a politician can become leader of the country. Also explored are the possible emergencies, such as the sudden serious illness or even death of a prime minister, and their constitutional responses. This book concludes by looking at whether the procedures discussed could be set out in an authoritative and user-friendly code, and a sample one is suggested.Covering historical examples and modern turmoil, this book in an essential guide for understanding the rules and processes involved in choosing a prime minister.