As human rights have increasingly gained importance at the European Union level, this article examines the remaining scope of human rights protection under the EU–UK Trade and Cooperation Agreement. While some international human rights instruments remain applicable, the Charter of Fundamental Rights of the European Union did not become part of the Trade and Cooperation Agreement (TCA). The consequences, especially the inapplicability of the internationalised ne bis in idem principle, are analysed. Furthermore, the conditionality of the TCA in general as well as the specific conditionality for judicial cooperation in criminal matters are discussed. In this context, the risk that cooperation may cease at any moment if any Member State or the UK leave the European Convention of Human Rights is highlighted. Lastly, the authors raise the problem of the lack of judicial review, as the Court of Justice of the European Union is no longer competent.