People are warned about a rise in disruption on the roads of south Wales as world leaders and delegates gather at the Nato summit in Newport. Roads between the Celtic Manor Resort and Cardiff are most likely to be hit, but there are no plans to close the M4. Traffic has already been restricted in Cardiff city centre, where some roads have now been closed due to the summit. Cardiff Airport said flights would not be affected, but passengers are urged to allow extra time for road journeys. People have also been asked to use public transport wherever possible. Image caption Lane closures for security fencing have already been causing delays in Cardiff Ch Supt Alun Thomas from South Wales Police, the Silver Commander responsible for the operational delivery of the Nato summit, said they were looking after an “unprecedented international global event”. He said: “It is fair to say that this is totally unprecedented and something that the UK has never managed before so whilst it’s challenging for us locally in Wales, what an opportunity, what a fantastic chance for us to display Wales across the globe and show the rest of our partners and colleagues that we are capable of delivering this on behalf of Wales.” Newport disruption Road closures in Newport have been limited to the area around the Celtic Manor Resort on the outskirts of the city, which is hosting the summit on Thursday and Friday. Image copyright Getty Images Image caption Police riders have been…more detail