Mark Rowley, former head of Met's counter-terrorism unit, to take helm after spate of scandals, including the kidnap, rape and murder of a stranger by an officer

Following 2 recent attacks in London, justice secretary says government will introduce emergency legislation to end early freedom without review for terror offenders

PM Boris Johnson vows to change laws that let convicted terrorists, like Sunday's stabber, obtain an early release from prison

Government says it will launch 'major review' of current practices, following last year's London Bridge attack by convicted terrorist Usman Khan

Darryn Frost says he instinctively grabbed the rare object off the wall when Usman Khan began stabbing people in deadly attack last month

Jones, of Warwickshire, was a volunteer at the event marking prisoner rehabilitation where former convict Usman Khan went on deadly rampage

With just 12 days to go to a general election, would-be premiers insist the other side won't protect Britons from the likes of terrorist Usman Khan

Usman Khan, 28, was convicted in 2012 of grave terror charges, served less than half of his prison term before being released early

Jack Merritt, 25, was at prisoner rehabilitation event also attended by terror suspect; video footage shows men with fire extinguisher, tusk, battling with attacker

Following terror attack, former counterterrorism official warns criminal justice system 'playing Russian roulette with lives'; minister vows swift government review of laws