This casebook, designed for a readership of graduate students, policy makers, and practitioners in competition law, aims to provide a comprehensive reference on EU and UK competition law. While the majority of the text comprises analysis supplemented with detailed commentary and analysis of judgments, NCA and Commission decisions, and legislation, the casebook also gives a high-level introduction to the design and history of EU and UK competition law, including an overview of the main actors and their objectives, furnishing students with the understanding of the law required to practise competition law. In particular, the casebook takes an interdisciplinary approach to the subject, featuring a substantial section on the economic context of competition law accessible even to those with no economics background. The book is accompanied by specialist volumes on intellectual property and enforcement and procedure.