The United Kingdom (UK) left the European Union (EU) on 31 January 2020. Since then, under the EU-UK Withdrawal Agreement, a transition period has been in force, in principle until 1 January 2021. During this period most EU law, including its competition law, continues to apply in the UK.

The Withdrawal Agreement allows the EU and the UK to extend the transition period by one or two years, but only if an extension is agreed before the end of June 2020. While this may change, the UK government has repeatedly stated that it does not intend to request an extension.