Guidance
Domestic radiological and nuclear security system
A summary of the UK’s domestic RN security system.
Documents
Details
This summary of the radiological and nuclear (RN) security system sets out the UK’s RN detection and response capabilities.
In addition to this summary, the government sets out some of the main risks that face the UK in the National Risk Register 2026.
General information on how to prepare for emergencies can be found in the Prepare website.
Updates to this page
Published 23 September 2026