Question to the Cabinet Office:

To ask the Minister for the Cabinet Office, with reference to the answer of 18 March 2026, to Question 119323, on European Court of Justice, and with reference to the UK-EU Summit - Common Understanding, of 22 December 2025, what is the Prime Minister's policy on permitting greater jurisdiction by the European Court of Justice in relation to (a) Reinforced law enforcement and judicial cooperation in criminal matters, (b) Judicial cooperation in civil and commercial matters, (c) Cooperation in relation to drugs risks and threats and (d) European Union border security including through law enforcement cooperation.

The UK and the EU agreed in the May 2025 Common Understanding to protect the public and increase the safety and security of UK and EU citizens through a range of commitments on law enforcement and judicial cooperation, including in relation to drug risks and threats and border security. This is in addition to existing exchanges of law enforcement and criminal justice data with EU Member States through the Trade and Cooperation Agreement. None of these existing arrangements provide for oversight of the Court of Justice of the European Union (CJEU) and there have been no discussions on CJEU jurisdiction with respect to our work to enhance cooperation in these areas.