Abstract
This chapter explores the founding principles, operational functioning and impact of the institutions which have evolved across the four nations in the United Kingdom to deal with children and young people who come into conflict with the law. It takes as its principal empirical focus the shifting patterns of control that have emerged over the past twenty years—a period characterized by a persistent disjuncture between normative claims about youth justice, evolving policy discourse, and the impact of youth justice practices on the lives of young people. The chapter concludes by arguing that, unless there is better alignment between these dimensions, justice for children and young people cannot and will never be delivered.