A motorcyclist is fighting for his life in hospital after being involved in a crash in the early hours.

Emergency services were rushed to Rickmansworth Road near Wynlie Gardens, Pinner, at 1.20am this morning (Sunday) following reports of a collision involving a car and a motorcycle.

Met Police said a motorcyclist in his 20s was found suffering serious injuries.

He was taken to a west London hospital where he remains in a critical condition, police said.

A 26-year-old man was arrested on suspicion of driving whilst under the influence of drugs. He was taken into police custody where he remains.

Detectives from the Serious Collision Investigation Unit are appealing to any witnesses or anyone with dash-cam footage of the collision to call 020 8246 9820 or 101 quoting reference CAD989/19May.