Avoid and report anti-competitive activity
Report anti-competitive activity
The way you report anti-competitive activity depends on the type of activity.
Report a cartel
A cartel is where two or more businesses agree not to compete with each other, for example by sharing a market or fixing prices.
Make a report if you:
- know about a cartel
- have been involved in one
If you report a cartel, you may:
- get a financial reward for information that leads to an investigation
- be treated with leniency if you report a cartel you’ve been involved with
Make a report online
Make a report by email or phone
CMA cartels hotline
cartelshotline@cma.gov.uk
Telephone: 0800 085 1664 or 020 3738 6888
Find out about call charges
Report other anti-competitive activity
Tell the CMA if you have concerns about anti-competitive activity. Email general.enquiries@cma.gov.uk with the following information:
- your contact details
- the business or businesses you have concerns about
- what sector the business works in
- a description of the issue
- any supporting evidence you have
- details of any other organisations you have contacted
If you want help with a consumer problem, contact Citizens Advice (or the Financial Conduct Authority for consumer credit-related issues).
Report your concerns to an industry regulator
You can also report concerns about anti-competitive activity in certain sectors to a regulator. These are:
- Civil Aviation Authority for airports and air traffic services
- Financial Conduct Authority for financial services in the UK
- Ofcom for television, radio, telephone, postal and internet services
- Ofgem for gas and electricity in England, Wales and Scotland
- Ofwat for water and sewage services in England and Wales
- Office of Road and Rail for railways in England, Wales and Scotland
- Payment Systems Regulator for payment systems in the UK
- Utility Regulator for gas, electricity, water and sewerage in Northern Ireland