This chapter concentrates on the UK government, the part of the UK political system responsible for creating policy and putting it into effect. The chapter looks at the nature of the UK government, and the way it is made up of ministers, and civil servants and departments. The chapter also looks at the types of ministers, their legal and political powers, and the rules applying to them. The chapter assesses the constitutional position of the civil service, and its relationship with ministers and Parliaments. It also describes the departmental structure of the UK government and the so-called arm’s-length bodies within it. The chapter presents a number of perspectives on the way in which power operates within government and considers how the various ideas play out in reality. The chapter revisits the issue of Brexit but this time in the context of the civil services and ministers.