This chapter studies a key aspect of delegation in British politics: decentralization and local/national self-government. It deals with local government in England, and government in the devolved territories/nations of Scotland, Wales, and Northern Ireland. Decentralization in British politics has formed into a complex pattern, where there are different dynamics in the various territories: relative centralization in England, power-sharing in Northern Ireland, pragmatic devolution in Wales, and then a strong push towards independence in Scotland. For a question about how centralized or decentralized British politics is, the answer would need to be based on where a person lives, with England rehearsing the conventional arguments about constitutional centralization and the rest of the country increasing decentralization, if not a form of federalism. The chapter then assesses the question of the rationale and general stability of the system, with respect to the integrity of the UK as a whole.