This chapter switches the focus to political parties. It looks at their individual roles and how they operate. The chapter discusses the parties that constitute the ‘party system’. It considers the two main parties operating at the UK level: the Conservative Party and the Labour Party. It also looks at the smaller parties, such as the Liberal Democrats. The chapter considers the political approach of the various parties and the type of support they attract. It also looks at how parties are funded. The chapter provides a number of theoretical perspectives to help with an analysis of political parties. These are: the extent to which parties pursue values or power; the respective roles of their members and leaders; groupings within parties; how far the UK has a two-party system or whether our definition of the party system should be revised; and the relationships between the various parities. The chapter then gives examples of how these ideas play out with specific focus on recent events involving the Conversative and Labour parties. The chapter asks: do members have too much influence over their parties? The chapter ends by asking: where are we now?