The UK’s national infrastructure and associated assets, as well as a broader range of UK businesses and organisations, currently face threats from terrorism, espionage and other hostile foreign activity.

Understanding the threat facing your business is key to ensuring protective security measures and mitigations are proportionate, effective and responsive.

More information on the national security threats facing the UK can be found on the Security Service (MI5) website.

To report an imminent threat call 999 or ring the police Anti-Terrorist Hotline on 0800 789 321.

If you know something about a threat to national security such as terrorism or espionage, contact MI5 online via their website or call:

  • Freephone 0800 111 4645
  • 020 7930 9000 (standard call rates apply)
  • +44 20 7930 9000 (international calls only)