A woman who was engulfed in flames and burned to death was today named as Emma Gibson of Port Hall Road, Brighton.
Police think Ms Gibson may have doused herself in petrol after stopping her car.
Bystanders saw the victim running from the vehicle along a country lane near Henfield.
One said: "Her clothes were on fire. It was terrible, absolutely horrendous."
Witnesses heard an explosion as Ms Gibson's VW Golf burst into flames in Blackstone Lane, Woodmancote, at about 10.30am on Monday.
Emergency services arrived at the scene minutes later. Firefighters and members of the public gave first aid until an ambulance arrived.
Ms Gibson was taken to the Princess Royal Hospital, Haywards Heath but died later the same day.
A police spokeswoman said crime was not suspected.
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