UK businesses are subject to both domestic law and EU law, despite the effects of Brexit. EU businesses that operate in other jurisdictions are also subject to the domestic law of the jurisdictions in which they operate.
Public enforcement of competition law is enforced in the UK by the Competition and Markets Authority, in the EU by the European Commission, and by the relevant National Competition Authorities in foreign jurisdictions.
Private enforcement of competition law can be undertaken by anyone that has, or will, suffer harm from a breach of competition law. This can include producers, suppliers, customers, consumers or competitors.
Competition law can be relevant to all types of agreements, including verbal or informal agreements.
Breaches of competition law can result in fines and damages, as well as criminal sanctions for individuals in the UK, and director disqualification.