GOV.UK
National Counter Terrorism Security Office
Featured
News story
New Communities Defeat Terrorism campaign launched
A new eight-week Communities Defeat Terrorism advertising campaign has been launched in cinemas.
News story
Over a thousand companies sign up for new counter terrorism training course
ACT Awareness is an innovative course that could save lives
Guidance
Stay Safe Film
Advice for the public on the steps they can take to keep themselves safe in the rare event of a firearms or weapons attack.
Guidance
Crowded places guidance
Guidance on increasing the protection of crowded places from a terrorist attack.
News story
Action Counters Terrorism: Report suspicious activity and behaviour
NaCTSO urges the public to help the police tackle terrorism and save lives by reporting suspicious behaviour and activity.
Guidance
Bus and coach security: best practice
How operators can improve or maintain security to reduce violence on buses and coaches, or at stations and depots.
Latest from the National Counter Terrorism Security Office
What the National Counter Terrorism Security Office does
The National Counter Terrorism Security Office (NaCTSO) is a police unit that supports the ‘protect and prepare’ strands of the government’s counter terrorism strategy.
NaCTSO works with the Home Office.
Documents
Guidance and regulation
See all guidance and regulationContact NaCTSO
Action Counters Terrorism: Report Suspicious Behaviour
Confidential Hotline
0800 789 321
It’s probably nothing but… if you see or hear anything that could be terrorist-related trust your instincts and call the Confidential Hotline.
If you think you have seen someone acting suspiciously, or if you see a vehicle, unattended package or bag which might be an immediate threat, move away and call 999.
Report online material promoting terrorism or extremism
Report illegal or harmful information, pictures or videos you’ve found on the internet. You can make your report anonymously.
Contact your local Counter Terrorism Security Advisers
Counter terrorism security advisers help businesses and local communities. Contact your CTSA for help and guidance on security and details of local awareness events.
National Counter Terrorism Security Office
London
SW1P 1XD
United Kingdom
Main switchboard
+44 (0)207 931 7142
Enquiries should be addressed to your local CTSA in the first instance. To report suspicious behaviour please use the Confidential Hotline.
Media enquiries
10 Victoria Street
London
SW1H 0NN
United Kingdom
Telephone
020 3276 3803
Freedom of Information (FOI) Act
This organisation is not covered by the Freedom of Information Act. To see which organisations are included, see the legislation.