The document summarizes the development of UK counterterrorism strategy and legislation since the Northern Ireland conflict. It describes the evolving threat from Islamist terrorism. The UK adopted the CONTEST strategy in 2003 with four pillars (Prevent, Pursue, Protect, Prepare) and established new agencies like JTAC. Legislation expanded police powers and allowed control orders and detention without trial. Critics argue these measures undermine civil liberties and fair trials. Reviews propose modest changes but retain broad imprecise offenses and executive powers based on suspicion rather than evidence.