Sydney-style terror attack could happen in UK at any time, says David Cameron

PM says security services can't always prevent 'self-starting, sometimes quite random' attacks like siege of Lindt cafe An attack similar to the one in Sydney's Lindt cafe could happen in Britain at any moment, David Cameron has said, warning that such attacks were very difficult to prevent. The threat faced by the UK included "self-starting, sometimes quite random attacks that could happen at any moment", the prime minister told MPs on Tuesday.