Terrorism in the United Kingdom is considered by the Home Office to pose a "significant threat" to security and peace.
Islamic extremism, far-right attacks and North Irish terrorists have posed the most recent threats to the United Kingdom.
In the past 10 years, there have been several attempts to commit terrorist attacks in Britain.
In August 2006 eleven individuals tried to detonate liquid explosives carried on board several airliners travelling from the UK to the US, with 24 suspects arrested in and around London.
In June 2007, a car rammed into a terminal at the Glasgow International Airport. No casualties, aside from those of the driver, resulted.
The most serious terrorist offence in recent times, since the Northern Irish peace process, was the 7 July 2005 London bombings conducted by four separate Islamist extremist suicide bombers, killing 56 people and injuring 700.