The following paper considers the potential impact of the UK’s withdrawal (‘Brexit’) from the European Union (EU) on efforts to tackle modern slavery. The purpose of this briefing is to review the extent to which the UK’s membership in the EU has influenced national anti-trafficking efforts, and consider if and how Brexit may impact the UK’s ability to combat modern slavery and protect its victims. Where possible, recommendations have been made on the steps to take to mitigate any potential risks posed by Brexit to UK anti-trafficking efforts.