In the matter of an application by Martina Dillon & Ors for Judicial Review; In the matter of an application by Martina Dillon & Ors for Judicial Review (No 2) [2026] UKSC 15 (07 May 2026)

Executive summary

The Supreme Court heard appeals in judicial review proceedings brought by Martina Dillon, John McEvoy, Brigid Hughes and Lynda McManus challenging provisions of the Northern Ireland Troubles (Legacy and Reconciliation) Act 2023. The judgment explains the Act’s scheme, including the Independent Commission for Reconciliation and Information Recovery, limits on investigations, inquests and civil actions, and the immunity mechanism for certain Troubles-related offences.

Key points

• Parties included victims of Troubles-related crimes and the Secretary of State for Northern Ireland, with the Police Ombudsman for Northern Ireland, the Department of Justice and Coroners Service, and several public-interest bodies intervening.
• The court set out that the 2023 Act replaced police investigations, certain Ombudsman investigations, inquests and civil actions with an inquisitorial review process by the ICRIR.
• The stated policy aims of the Act were reconciliation and peace, and to end what the UK Government considered vexatious claims against veterans.
• The judgment frames the legal issues as compatibility with Articles 2 and 3 of the European Convention on Human Rights and potential disapplication under article 2(1) of the Windsor Framework via section 7A of the European Union (Withdrawal) Act 2018.
• No sanctions or export-control issue is identified in the source text; the relevance is to accountability, investigatory powers, and rule-of-law risk in Northern Ireland legacy cases.

Why it matters

This is relevant to sovereign risk and national-security governance because it addresses how the UK can restructure legacy conflict accountability mechanisms, including immunity and the curtailment of criminal, civil, and coronial processes. For compliance and litigation strategy, it signals a high-stakes test case on whether domestic legacy legislation must yield to ECHR obligations and the Windsor Framework.

Implications

For litigants, the decision is a focal point for challenging or defending the 2023 Act’s restrictions on investigations, inquests, civil claims, and immunity decisions. For public authorities and regulated entities, it reinforces that legacy-conflict policy can drive major changes in enforcement pathways, evidence access, and the timing and availability of proceedings, with downstream effects on disclosure, record retention, and litigation posture.