A prisoner was taken to hospital after the prison van he was travelling in crashed into another vehicle.
The prison van collided with a white van at around 6.50pm yesterday on the anti-clockwise carriageway of the M25 between Dartford and Swanley, junctions two and three.
Dartford fire fighters confirmed they helped rescue the prisoner who was trapped in the van at about 7.40pm.
One lane was closed for more than two hours.
All lanes reopened at 9.35pm.
More updates to come. Did you see what happened? Leave a comment below or contact the news desk on 01474 564327.