The Digital Markets, Competition and Consumers Act 2024 introduces significant changes to U.K. merger control and antitrust rules, establishes a new consumer protection regime and introduces a groundbreaking new digital markets regime. Most of the Act’s provisions took effect on January 1, 2025. Businesses with operations in the U.K. ‐ particularly those active in digital and consumer sectors ‐ should ensure they are in full compliance as the rules go live.