Case law can be broken down into common law, equity, and custom. This chapter begins with a discussion of common law and equity, including a brief history on how these sources came into being. It then turns to custom as a further source of law. It also provides an overview of the court system to illustrate how the various courts in the system link together in a hierarchy. It concludes with a discussion of the European Court of Human Rights and the impact of the Human Rights Act 1998 on case law.