The crash, which involved a van and a car, happened on the anticlockwise carriageway between junctions 27 and 26 and led to long delays. The van overturned during the incident. (Image: M25 National Highways traffic cameras)A spokesperson for the East of England Ambulance Service said: "We sent two ambulances and an ambulance officer vehicle to the scene. Traffic was briefly held as emergency services responded and recovery crews later arrived to remove the overturned van. Although all lanes have since reopened, National Highways reported residual delays of around 20 minutes and two miles of congestion while traffic cleared.