A teenager could be facing prison after admitting causing the death of an elderly woman in a crash on the M25 near Swanley.

Chloe Thompson wept in the dock at Maidstone Crown Court as a judge told her: “You will have been advised as to the likely sentence.”

The 19-year-old, of Carlton Road, Eastbourne, east Sussex, pleaded guilty to causing the death of Anne Tongs, who was in her 70s, by dangerous driving.

Her Smart Forfour was involved in a pile-up on June 3 near junction 3 of the motorway.

The victim, who was driving a Citroen C4, was pronounced dead at the scene. Others involved in the smash were taken to hospital.

Prosecutor Siobhan Molloy said there was very clear dash cam film of the crash lasting a minute from a car travelling behind that pulled over.

Quinton Hunt, defending, said the consequences of Thompson’s driving had been “nothing short of tragic”. There had also been profound consequences for her, he added.

Mr Hunt said a psychiatric report in respect of the neurological conditional the teenager suffered from was being prepared.

Judge David Griffith-Jones QC also agreed to order a probation report.

Adjourning sentence until February 8, he said: “There is no indication as to the likely sentence.

“Given she is young and of previous good character, it seems to me the court would be aided by input from the probation service in those circumstances.”

The judge said the court would need full information about injuries to others.

He told Thompson before releasing her on unconditional bail: “You should not draw any conclusion about what has happened today as to what the sentence will be.

“You know a sentence of immediate custody is the likelihood.”