Titles in the Complete series combine extracts from a wide range of primary materials with clear explanatory text to provide readers with a complete introductory resource. Devolution can be defined as the conferral of powers by a central governing institution on a regional or national governing body, without the central institution having to concede legislative supremacy. Such devolved powers can be administrative, executive, or legislative in nature. The process of devolving such powers to three of the UK’s four nations—England, Scotland, Wales, and Northern Ireland—was initiated by the passing of the Devolution Acts of 1998. This chapter begins by tracing the history of devolution, and then discusses the ways that power can be devolved, and the roles and powers of the Scottish Parliament, Welsh Assembly, and the Northern Ireland Assembly. It addresses the question of whether there should there be an English Parliament, and finally, examines the effects of devolution on parliamentary supremacy as well as the effects the UK’s exit from the EU may have on the devolution settlement too.