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Departments, agencies and public bodies
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Detailed guidance, regulations and rules
Reports, analysis and official statistics
Consultations and strategy
Data, Freedom of Information releases and corporate reports
Tell the CMA about competition and consumer issues.
Guidance on how the Competition and Markets Authority (CMA) operates the mergers control regime under the Enterprise Act 2002.
Tell the CMA about issues with a business, a market, or to provide information about a new or existing case.
How designated retailers are expected to fairly manage their relationships with suppliers.
Why the Competition and Markets Authority (CMA) cleared the Vodafone / Three merger and what it could mean for customers.
Guidance to help businesses make sure their contract terms and notices are fair and clear to consumers.
Guidance on processes that the CMA uses when using its powers under the Competition Act 1998 (CA98) to investigate suspected infringements of competition law.
How to appeal a regulatory decision from the Environment Agency or report when they have not followed the Regulators’ Code.
Guidelines for businesses and their advisors on the CMA’s substantive approach to assessing mergers.
Guidance on how the CMA applies the Chapter I prohibition in the Competition Act 1998 to vertical agreements, and on the application of the VABEO to vertical agreements
Details on the new digital markets competition regime, and how it will promote competition in digital markets.
This guidance was intended to help traders to comply with the Consumer Protection from Unfair Trading Regulations 2008 (CPRs). It is replaced by 'CMA207: unfair commercial practices' from 6 April 2025.
Guidance on the principles and process of applications for leniency and no-action in cartel cases.
How to notify the Competition and Markets Authority (CMA) about a merger involving your business.
The order implements the reforms set out in the Competition and Markets Authority’s (CMA) retail banking market investigation report.
Information for businesses about how the Competition and Markets Authority (CMA) investigates mergers, including processes, timelines and possible outcomes.
Guidance on how the CMA applies the Chapter I prohibition in the Competition Act 1998 to horizontal agreements, and on the application of the Specialisation Agreements Block Exemption and the Research and Development Block E…
A basic guide for businesses on the Consumer Protection from Unfair Trading Regulations.
The Competition and Markets Authority’s policy and approach to transparency and information disclosure.
What to do if you're thinking about a merger, or already going through a merger investigation.
Don’t include personal or financial information like your National Insurance number or credit card details.
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