This book sets out the way that, through enhanced private antitrust enforcement reform, private international law has a pivotal role in EU competition law disputes with an international element. The author offers a thorough analysis of the post-2003 policy of the EU favouring private law enforcement of EU competition law and its implementation under the existing provisions for jurisdiction and recognition and enforcement of foreign judgments under the Brussels I regime. The book also considers how the jurisdiction, recognition and enforcement of judgments issues are dealt with in England under the common law rules applicable when Brussels I does not apply. The complex private international law problems in respect of cross-border class actions that have arisen in several countries, as well as judgments in relation to antitrust infringements, are also discussed. The author further examines the choice of law issues that may arise before the English courts under Rome I and Rome II. The potential problems regarding jurisdiction of arbitral tribunals and choice of law in arbitral proceedings in relation to EU competition law claims, and the jurisdiction of English courts in proceedings ancillary to arbitration claims, are dealt with accordingly.