The Civil Nuclear Constabulary's Operational Policing Unit at Dounreay has completed its most ambitious Regulatory Evaluation Demonstration Exercise, receiving an "adequate" rating from the Office for Nuclear Regulation, the force said in a 29 October 2026 announcement.

In the scenario, a lorry carrying a flask of nuclear material from Dounreay power station, bound for onward rail transport from Georgemas Junction, was stopped by a deliberate car crash and attacked by armed offenders. Information about an insider led officers to arrest a member of NRS staff. Responding officers neutralised the threat within minutes before local emergency services took over, and the force then ran a Post Incident Management scenario.

The following day, CNC joined NRS Dounreay, Highland Council, the Vulcan Naval Reactor Test Establishment, Police Scotland and other blue light partners in a workshop on site and community recovery. Exercise and Resilience Manager Steve Warren said the scenario had not been tested before. Chief Inspector Dave McIntosh said the contingency worked and the nuclear material was protected.