Short answer
Through MI5, the PSNI, UK-wide counter-terrorism laws and the wider UK security network, all working together.
What we know Fact
- MI5 leads intelligence work on national security; the PSNI leads on policing.
- UK counter-terrorism legislation applies in Northern Ireland.
- MI5 publishes the threat level from Northern Ireland-related terrorism. In March 2024 it was lowered from Severe to Substantial (an attack is likely).
