On Tuesday, June 4, emergency services were called to the B2112 Common Lane at Ditchling Common, near Burgess Hill, after a car left the road and collided with a tree before overturning in a ditch near the Oaks Poultry Farm.
A 26-year-old woman had been a rear-seat passenger in the car, a blue Vauxhall Corsa, police said, and died at the Royal Sussex County Hospital in Brighton, on Tuesday, June 11.
Also in the car were a 29-year-old man and a 22-year-old woman, both of whom were seriously injured, said police.
They too were taken to hospital. All three casualties were from the Haywards Heath area.
A Sussex Police spokesman said: “Police are renewing an appeal for witnesses following the death of a 26-year-old woman who was involved in a single vehicle crash at Ditchling Common, near Burgess Hill, on Tuesday, June 4.
“Anyone who saw what happened or noticed the vehicle being driven shortly beforehand, who may have dash-cam footage or who has other relevant information, is asked to report details online, to email [email protected] or to phone 101, quoting Operation Alto.”
Common Lane was closed to traffic until 6.30am following the tragic collision, police said.
The coroner has been informed, added police.