Supreme Court judgment in Dillon on the Windsor Framework

07 May 2026

The Supreme Court has handed down judgment in Dillon v Secretary of State for Northern Ireland.

The case concerns the compatibility of the Northern Ireland (Legacy and Reconciliation) Act 2023 with the European Convention of Human Rights, and the non-diminution guarantee in Article 2 of the Windsor Framework (formerly the Northern Ireland Protocol). The Act brought to an end Troubles-related inquests, new civil claims, Police Ombudsman and police investigations.

The case has significant implications for the meaning and effect of Article 2 of the Windsor Framework, including on questions of direct effect and the application of the EU Charter in domestic law post Brexit.

Jack was instructed by Darragh Mackin of Phoenix Law and acted for the lead respondents / cross-appellants (Dillon et al), and was led by John Larkin KC and Jude Bunting KC.

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