This Practice Note provides an overview of the powers of the Competition and Markets Authority (CMA) (and other sector regulators) to conduct inspections, including unannounced inspections (often referred to as ‘dawn raids’), and also its powers to conduct interviews where it considers that there may have been a breach of competition law. These powers are predominantly contained in the Competition Act 1998. This Practice Note has also been updated to reflect the Digital Markets, Competition and Consumers Act 2024 (DMCC Act) which entered into force on 1 January 2025. The DMCC Act creates a new digital markets regime targeting large tech companies as well as broadening the scope of the Chapter I prohibition and increasing the investigatory powers of the CMA.