This chapter discusses what makes British politics distinctive and recognizable: its parliamentary democracy, uncodified constitution, and pattern of party government. It begins by outlining some recent events that have made British or UK politics so fascinating and controversial. The chapter then describes the political system, particularly the institutional rules that affect what happens and govern how politics takes place. Parliament, composed of the House of Commons, House of Lords, and the Crown, is the supreme legal authority in the UK. The chapter also provides a summary of the British constitution. It places the UK in a comparative context, to be studied alongside other nation states. Finally, the chapter sets out the information and concepts that help in understanding the nature of and limits to British democracy.