Source Currency: Issue 170, June 2026. The following parts of this title have been updated for Issue 170 (June’ 26): Division I Principles of EU and UK Competition Law Chapter 5 Overview of UK Competition Law Division III Horizontal Agreements Likely to be Permitted Chapter 1 Horizontal Co-operation Agreements Chapter 2 Commission guidelines on horizontal co-operation agreements Chapter 3 Research and development agreements Chapter 4 Production agreements including specialization Division XB Public Enforcement of UK Competition Law Chapter 3 Civil Enforcement: Competition Act 1998 Investigations Chapter 4 Criminal Enforcement: Enterprise Act 2002, Cartel Offence Chapter 5 Leniency and no action letters in cartel cases Chapter 6 Appeals and Judicial Review Division XII Extra-territoriality Extra-territoriality.