A motorcyclist has been paralysed permanently after he was involved in a crash on the M25 last week.

Hertfordshire Constabulary has confirmed the 41-year-old biker has undergone a successful back operation but says is now paralysed.

The man was injured after a crash on the M25 near j17 for Maple Cross just before 7am on May 15. The motorway was closed for around seven hours and an air ambulance attended. The collision involved a motorbike, a black Ford Focus, and a lorry.

The driver of the Ford, a 57-year-old man from London, was arrested on suspicion of causing serious injury by dangerous driving in connection with the collision. He has been released under investigation while enquiries continue.

The biker remains in hospital before he will move to a rehabilitation centre for further treatment.

Any witnesses or anyone with dash cam footage is asked to contact police on 101 quoting ISR 99 of May 15.