A terrorist attack could occur at any time and by a variety of means. Counter terrorism teams in partnership with other organisations and agencies work hard to combat or prevent terrorism.
The current UK threat level remains at severe, meaning an attack is highly likely.
The public are urged to remain alert and not alarmed. Everyone is advised to be vigilant and immediately report any concerns to the confidential Anti-Terrorist hotline on 0800 789 321. In an emergency, always dial 999.
Terrorism is a crime - report it.
You can report online material promoting terrorism or extremism confidentially at: www.gov.uk/report-terrorism
Advice to the public on steps you can take to keep yourself safe in the rare event of a firearms or weapons attack can be found in the governments stay safe film below: