Report a competition or market problem
Tell the CMA about competition and consumer issues.
The CMA cannot step in or advise on individual complaints.
For help with your individual case or problem, contact the relevant consumer advice organisation in your area.
Report a problem to the CMA
Report competition, consumer or market problems to the CMA:
- online: Report a problem to the CMA
- by phone: 020 3738 6000
- by email: [email protected]
Report a cartel to the CMA
Report a cartel:
- online:
- by phone: 020 3738 6888
- by email: [email protected]
.
If you or your business has been involved in a cartel, contact our leniency programme:
- online: Cartels: come forward and apply for leniency
- by phone: 020 3738 6833
Whistleblowing
Whistleblowers are employees, or former employees, that report illegal activities carried out by the business or organisation they鈥檙e 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鈥檚 important you report it to the CMA.
You can report whistleblowing concerns to the CMA:
- online: Make a whistleblower report
- by phone: 020 3738 6556
- by email: [email protected]
Find out more about whistleblowing, including your rights and how the CMA will protect your identity.
What happens next
After you鈥檝e submitted your complaint to us, you鈥檒l receive an automated response via email and we鈥檒l review all the information you provide.
We cannot respond in detail to individual complaints, but using your information 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 it. We will contact you if we need to rely on the information you鈥檝e provided to open the case. If you have any questions or concerns, please contact us at [email protected].
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 a problem to another regulator
In some cases, you may want to report your concerns to an industry regulator:
- airports and air traffic services:
- financial services:
- gas and electricity in England, Wales and Scotland:
- gas, electricity, water and sewerage in Northern Ireland:
- payment systems:
- railways in England, Wales and Scotland:
- television, radio, telephone, postal and internet services:
- water and sewerage services in England and Wales:
- if you think advertising rules have been broken: the