LONDON: International terrorism is posing Britain its most sustained threat since the end of World War Two and can only be tackled with the public’s help, Home Secretary John Reid said on Wednesday. In a speech to the think tank Demos in London, Reid said there was “not one inch of room for complacency” over security. “We are probably in the most sustained period of severe threat since the end of World War Two,” he said in excerpts released by the Home Office. “While I am confident that the security services and police will deliver 100 percent effort and 100 percent dedication, they cannot guarantee 100 percent success.” Reid’s comments echo those regularly made in recent months by senior police officers and security officials. On the anniversary of the July 7 suicide bombings, London’s police chief Ian Blair said the threat had “palpably increased” in the year following the attacks on the capital and that “further atrocities” were being planned. Blair and his senior colleagues have also repeatedly said they needed support and intelligence from Muslim communities if they are able to counter the threat from radical Islamists based in the UK and abroad. “Our security forces and the apparatus of the state provide a very necessary condition for defeating terrorism but can never be sufficient to do so on their own,” Reid said. “Our common security will only be assured by a common effort from all sections of society.”