Detectives have launched an appeal after a 21-year-old was killed in a hit and run in Cheam.

Rhiannon Hall was enjoying a 'rare night out' when she was hit by a car on London Road, near the junction with Garth Road on October 16.

London Ambulance Services rushed Rhiannon to St Georges Hospital, where she remained in critical condition for six days.

Despite emergency services best efforts Rhiannon sadly died last week.

The driver failed to stop at the scene but was arrested a short time later on suspicion of drink driving. He was taken to a police station for questioning and has since been released under investigation.

MORE: Fundraiser launched for daughters of hit and run victim in Cheam

Detective Constable Jenny Burr, from the Met’s Serious Collision Investigation Unit, investigating, said:

“Our thoughts are first and foremost with Rhiannon’s family and friends at this truly tragic time for them.

“We are committed to establishing the circumstances of the collision and are still asking for witnesses and dash cam footage.

"Please come forward with any piece of information, even if you think it doesn’t seem relevant.

"You could help get answers for a grieving family and greatly assist our enquiries.”

Any witnesses or anyone with any information is asked to call the Serious Collision Investigation Unit on 020 8543 5157, or call 101 or tweet @MetCC quoting ref CAD 8295/16OCT20.