This book provides a detailed and authoritative survey of the law relating to public interest disclosure ("whistleblowing"). Six years on from the coming into force of the Public Disclosure Act 1998 (PIDA), the book looks at how the new system has developed, and provides up to date guidance on the key issues that arise in practice. It provides full coverage of protection for whistleblowers under, and outside PIDA; the obligation to blow the whistle; and rules, policies, procedures, and problems in particular sectors.