Britain is living through its most threatening time since the second world war, John Reid, the home secretary, warned today. In a speech to Demos, a London thinktank, the hyperactive home secretary - who will mark 100 days in the job this Friday - confirmed that a terrorist attack on the UK was "highly likely", as signalled by the current "severe" warning on official government websites. He also called for a "Darwinian" approach to the legal system, saying that it must be "responsive to change" in order to protect the nation against terrorism. Mr Reid said: "It is not the...