By leaving the EU, the UK will also leave EU agencies such as Europol and Eurojust. Brexit, therefore, may create a gap in cooperation between law enforcement authorities of different Member States in their ability to detect human trafficking. Legal instruments such as the European Arrest Warrant may be repealed and the UK may reduce their cooperation in EU criminal matters. While the UK remains in the EU, it can join EU legal measures in the criminal area. After Brexit, this option will no longer be available. There is thus the risk that the UK will decide not to be bound by the Human Trafficking Directive. This article seeks to explore where the UK stands in the fight against human trafficking and what position it may adopt after Brexit. Subsequently, the article explicates the claim that a larger number of vulnerable people may be targeted by criminal organisations and recruited for the purpose of human trafficking and forced labour because EU citizens may no longer be entitled to live in the UK with the same rights and entitlements. This analysis will be conducted by examining EU legislation in the criminal area, UK legislation on human trafficking and the proposals presented by the UK government.