There are delays on the M25 due to a crash involving a van and a trailer which went over the centre barrier. It happened on the anti-clockwise carriageway of the major motorway between junctions 5 and 4, near Sevenoaks. According to traffic monitoring tool Inrix, the incident involved two vans and an overturned trailer that had gone over the centre barrier, shortly before 9am. Traffic was held on both carriageways while emergency services, including the fire service, attended the scene and two lanes of three were closed. As of 1.10pm, all lanes have since reopened but motorists have been warne…