Report a competition or market problem
Tell the CMA about competition and consumer issues.
The CMA can’t step in or advise on individual complaints.
For advice and support on your individual case or issue, contact the relevant consumer advice organisation in your area.
Report an issue to the CMA
You can report competition, consumer or market problems to the CMA in a number of ways:
- online: Report an issue to the CMA
- by phone: 020 3738 6000
- by email: general.enquiries@cma.gov.uk
Whistleblowing
Whistle-blowers are employees, or former employees, that report illegal activities carried out by the business or organisation they’re employed by.
If the illegal activity relates to the sale of products, the supply of services or about competition affecting markets in the UK, it’s important you report it to the CMA.
You can report whistleblowing concerns to the CMA in a number of ways:
- online: Make a whistleblower report
- by email: whistleblower@cma.gov.uk
- by phone: 020 3738 6556
Find out more about whistle-blowing, and what it means to be a whistle-blower, including your rights and how the CMA will protect your identity.
What happens next
After you’ve submitted your complaint to us, you’ll receive an automated response via email and we’ll review all your completed forms or details.
We can’t respond in detail to individual complaints.
As a result of the information you provide, we may:
- contact businesses involved with your submission
- investigate and take legal action against businesses
- conduct studies or investigations into markets
- prosecute people involved with cartels
If we decide to open a formal enforcement case, we may contact you and give you the opportunity to comment on this. We will contact you if we need to rely on the information you’ve provided to open the case. If you have any questions or concerns, please contact us at general.enquiries@cma.gov.uk.
When the CMA takes part in criminal enforcement work, it acts in accordance with the duties set out in chapter 5 of the code of practice for victims of crime (victims code).
Report an issue to another regulator
In some cases, you may want to report your concerns to an industry regulator:
- airports and air traffic services: Civil Aviation Authority
- financial services: Financial Conduct Authority
- gas and electricity in England, Wales and Scotland: Ofgem
- gas, electricity, water and sewerage in Northern Ireland: Utility regulator
- health services in England: NHS Improvement
- payment systems: Payment Systems Regulator
- railways in England, Wales and Scotland: Office of Rail and Road
- television, radio, telephone, postal and internet services: Ofcom
- water and sewerage services in England and Wales: Ofwat
- if you think advertising rules have been broken you can complain to the Advertising Standards Authority