Terrorism presents a serious and sustained threat to the United Kingdom and UK interests abroad.
The World Trade Center on fire after the 9/11 attacks.
International terrorism from groups such as Al Qaida present a threat on a scale not previously encountered. Drawing on extremist messages presented by figures such as Usama bin Laden, Al Qaida and its related networks seek to carry out terrorist attacks around the world, aiming to carry out "high impact" attacks causing mass civilian casualties.
Northern Ireland-related terrorism continues to pose a serious threat to British interests. Although a peace process has been active for several years, dissident Irish republican terrorist groups oppose the peace process and continue to attack economic and political targets.
Other domestic extremist groups, unrelated to the Northern Ireland situation, may aspire to campaigns of violence but lack developed terrorist capabilities. For the most part, they pose a threat to public order but not to national security.
For detailed guidance on how to protect your business from the threat of terrorism, please see the website of the Centre for the Protection of National Infrastructure (new window).