Police have erected nine feet high security fencing around Celtic Manor resort in Newport and Cardiff city centre

150 world leaders including Barack Obama and David Cameron will meet in South Wales on September 4 and 5

Kim Howells, former foreign office minister, fears that home grown Islamic State terrorists could be planning to attack

More than 9,000 officers from across the UK have been drafted in to police event and traffic disruptions are likely

The total cost for security is not yet known and is expected to be published after the summit by the Government