This book provides clear and comprehensive coverage of the policing system and police powers. Flow charts and diagrams are included to explain key areas as clearly as possible. It addresses the core elements of policing and police powers and the effects of the Human Rights Act 1998 on policing are discussed. This second edition has been revised and updated to take account of new legislation, case law and other developments in the area. It will be invaluable to students of constitutional law, criminal justice and civil liberties as well as practitioners needing a quick reference tool.