International terrorism is now the biggest single security threat faced by the United Kingdom. It is not confined to London but affects all parts of the country.
In recent years there have been cases on both sides of the Irish border of individuals being charged and convicted of offences relating to international terrorism. Individuals in both Northern Ireland and the Republic of Ireland have been linked to international terrorism; the Irish Prime Minister Bertie Ahern, speaking in July 2005, has said that there are "a number of al-Qaida sympathisers in Ireland" about whom the Garda was concerned.
A number of cases in recent years have highlighted the involvement of international terrorists with Northern Ireland. Most notably:
In response to the growing nationwide threat of international terrorism, Security Service resources have been increased. The role of the Service in combating the threat to Northern Ireland has also evolved. See The Security Service in Northern Ireland for more details.