We use some essential cookies to make this website work.
We’d like to set additional cookies to understand how you use GOV.UK, remember your settings and improve government services.
We also use cookies set by other sites to help us deliver content from their services.
You have accepted additional cookies. You can change your cookie settings at any time.
You have rejected additional cookies. You can change your cookie settings at any time.
Departments, agencies and public bodies
News stories, speeches, letters and notices
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.
The Competition and Markets Authority’s (CMA) processes for investigating market reviews, market studies and market investigations.
How the Competition and Markets Authority (CMA) operates the mergers control regime under the Enterprise Act 2002.
Guidance to help businesses make sure their contract terms and notices are fair and clear to consumers.
Tell the CMA about issues with a business, a market, or to provide information about a new or existing case.
The order provides measures to increase competition in the car insurance market and reduce the cost of premiums for drivers.
How to comply with competition law while working with other higher education providers.
The order implements the reforms set out in the Competition and Markets Authority’s (CMA) retail banking market investigation report.
How designated retailers are expected to fairly manage their relationships with suppliers.
How the digital markets competition regime will promote competition in digital markets.
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…
Guidance on processes that the CMA uses when using its powers under the Competition Act 1998 (CA98) to investigate suspected infringements of competition law.
The Competition and Markets Authority’s (CMA) approach to assessing mergers.
Guidance on the principles and process of applying for leniency and no-action in cartel cases.
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.
Information for vets and vet nurses about the Competition and Markets Authority's (CMA) provisional decision in its veterinary services market investigation.
How to report a potential breach of competition or consumer law to the Competition and Markets Authority (CMA), and what to expect from us.
The Competition and Markets Authority's (CMA) approach to remedies in phase 1 and phase 2 merger investigations.
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.
Why the Competition and Markets Authority (CMA) cleared the Vodafone / Three merger and what it could mean for customers.
Don’t include personal or financial information like your National Insurance number or credit card details.
To help us improve GOV.UK, we’d like to know more about your visit today. Please fill in this survey (opens in a new tab and requires JavaScript).