David Cameron: Britain could face Sydney-style attack ‘at any moment’

Britain could face a random attack similar to the Sydney siege in which three people died “at any moment”, David Cameron has said.

The Prime Minister said that attacks carried out by a lone extremist are “much more difficult to prevent” as he paid tribute to the “extraordinary bravery” of those caught up in the siege on Monday.

He disclosed that the security services have prevented several terror attacks in Britain which would have seen police officers murdered in “cold blood” .... http://www.telegraph.co.uk