This handbook, containing annotated materials and case summaries brought together in one volume, is an essential guide for practitioners, police officers, and other investigators alike. Focusing on the Regulation of Investigatory Powers Act 2000 (RIPA) and the Investigatory Powers Tribunal established by the Act, it is a practical tool for use both pre-trial and during trial. The book includes all relevant materials and guidance, case law, codes, rules, and regulations with commentary, footnotes, and cross-referencing to key sections, providing quick and easy access to the law relating to surveillance and the covert gathering of intelligence.