In this paper we review - from a UK perspective - how the UK government and its policy process have adapted to European integration. Has adaptation been a quiet revolution, a step-change, or both? In exploring this question we draw upon the conceptual literature of Europeanization. We employ it to shed light on the longerterm pattern of UK adaptation as well as to put into context the domestic changes currently under way. Our argument is that a step-change is under way in the Europeanization of the UK government. However, at the end of the paper we will reflect on how this development remains over-shadowed by broader circumstances: the continued weak public support for the EU and the divisions which emerged with key EU partners from the UK"s policy over Iraq. © Blackwell Publishing Ltd. 2005.