Tracking continuity and change over three phases -- EU membership, the negotiations, and the period after the UK’s departure -- this paper examines how the UK has managed its relations with the EU. For each phase, it looks at the definition of the coordination ambition, the sharing of responsibilities within the executive, between the executive and other bodies, and between London and the devolved authorities, the structures and processes put in place, and their operation. Based on extensive original research conducted by the authors, the paper contributes towards a wider debate about how European governments inside and outside the Union manage their relations with Brussels. It revisits, builds on, and updates earlier work on the national coordination of EU policy.