Secretary of State for Northern Ireland for Judicial Review [2025] UKSC 47 (17 December 2025)

Executive summary

The Supreme Court considered a Northern Ireland coroner’s decision to disclose gists of information even though the underlying documents were subject to a ministerial public interest immunity certificate. The appeal asked what standard of judicial review applies where a coroner balances open justice against national security and the NCND policy, and the court considered the issue in part on closed material.

Key points

• Appellant: Secretary of State for Northern Ireland; respondents included the Coroner, the deceased’s next of kin, and the Chief Constable of the PSNI.
• Underlying dispute concerned an inquest into the 1994 murder of Liam Paul Thompson and whether gists of sensitive material could be disclosed.
• The Minister certified that non-disclosure was justified to avoid a real risk of serious harm to national security; the Coroner upheld PII but ordered gist disclosure.
• The Secretary of State argued the gists would breach NCND and potentially reveal informer involvement or other sensitive state operations.
• The lower courts applied ordinary public law review standards; the appeal challenged whether a heightened review standard is required for PII balancing.
• The source text frames the issue as one at the intersection of open justice, national security, and counter-terrorism secrecy, but it does not yet set out the final holding in the excerpt provided.

Why it matters

This is directly relevant to national security and sovereign risk because it addresses how far courts can require disclosure of sensitive information in legacy inquests despite ministerial claims of harm to national security. It also implicates the handling of NCND material and informer-related secrecy, which are core concerns in sanctions-adjacent intelligence and state-security compliance contexts.

Implications

For compliance and litigation strategy, the case signals that parties relying on PII in Northern Ireland inquests must prepare for judicial scrutiny of whether gist disclosure can be compelled even where the Crown asserts NCND and national security harm. It also suggests that strategic disputes between departments and operational police bodies over secrecy positions can become decisive, so record-keeping, classification of sensitive material, and advance coordination on PII posture matter.