Police are investigating a report of a sexual assault in Chelmsford.
The victim, a woman aged in her 20s, was approached by a man driving a dark Mondeo as she walked home from V-Festival along Greenbury Way between 9.30pm and 10.30pm on August 20.
She got in the vehicle, which she believed was a taxi, after being offered a lift home. The man then drove a short distance before sexually assaulting her.
The victim managed to get out of the car before running away to raise the alarm.