Titles in the Complete series combine extracts from a wide range of primary materials with clear explanatory text to provide readers with a complete introductory resource. The court is tasked with checking the legality of government action, which is mainly done through the process known as judicial review. Judicial review is a special form of court process that calls the executive to account for its exercise of power. This chapter discusses the history of judicial review; the grounds of review; the judicial review of delegated legislation; judicial review and the constitution; the difference between judicial review and appeal; the role of the courts and the Human Rights Act 1998; the judicial review procedure; and the extent to which judicial review can act as a check on executive power.