A car driver has been seriously injured in a crash involving a lorry and an ambulance on the M25 in Surrey.
Surrey Police said the driver of the black BMW had suffered leg injuries in the collision which happened at about 03:30 BST near Walton on the Hill.
The driver was taken to hospital. Nobody else was injured.
The anticlockwise section of the road was closed between junction 10 and junction eight but has since been reopened.