A woman who collided with a Surrey Police Transit van was left with serious head and internal injuries.
The 34-year-old woman was taken to Kings College Hospital in London after the Ford Fiesta she was driving hit the white unmarked police van.
The incident happened on Friday June, 28 on the A29 at Warnham, near Horsham and emergency services including West Sussex Fire and Rescue arrived at around 1pm.
The injured woman remains in hospital in a critical but stable condition.
The driver of the van was taken to hospital suffering from shock and minor injuries.
If you witnessed the collision, call 101 quoting Op Kirkby.