Two women have been left with multiple serious injuries - and one of them was thrown from their car - following a crash on the M25 on Saturday night.

A man has been arrested on suspicion of driving while unfit through drink and causing serious injury by dangerous driving in connection with the smash, which happened just before 10pm on November 17.

A blue BMW 7 series was travelling between junctions 15 and 16 when it is said to have crashed into the back of a red Hyundai i10.

The driver and the passenger of the Hyundai, both 59-year-old women, suffered multiple serious injuries which are not believed to be life-threatening.

The woman in the passenger sear was thrown from the Hyundai during the crash.

The pair are still in St Mary's Hospital in Paddington where they were rushed to after the crash.

A 53-year-old man from Hayes was arrested and has been released on police bail until December 16.

Police are urging anyone with information to come forward to help with their investigation.

Investigating officer PC Mark Harris, of the joint operations unit based at Taplow, said: “We are investigating this collision in which two women were seriously injured.

"I would like to speak to anyone who witnessed the collision or who has any dashcam footage of what happened. If you can assist our investigation please come forward and contact police.”

If you have any information, call the 24-hour Thames Valley Police enquiry centre on 101 quoting the reference 43180352597 or report information online by clicking here.