On 29 March 2017, the United Kingdom notified its intention to leave Europe under Article 50 of the Treaty on European Union. From 1 January 2021, the final date of Brexit, it becomes a “third country”. Despite the free trade agreement reached in extremis on 24 December 2020, the consequences (regulatory, legal, customs, organisational, etc.) are manifold. This dossier takes stock of all the implications of Brexit for cosmetics companies and all the measures to be taken to limit its impact.