Recent years have witnessed a vibrant debate concerning the constitutional basis of judicial review, which reflects a broader discourse about the role of the courts, and their relationship with the other institutions of government, within the constitutional order. This book comprehensively analyzes the foundations of judicial review. It subjects the traditional justification, based on the doctrine of ultra vires, to critical scrutiny and fundamental reformulation, and it addresses the theoretical challenges posed by the impact of the Human Rights Act 1998 on administrative law and by the...