A BMW driver was arrested on suspicion of drink-driving after a crash involving a teenage motorcyclist which has left him fighting for life in hospital.

The 19-year-old rider suffered a bleed on the brain after the collision with a BMW X5 in Totterdown Street, Tooting, at around 3.35am on Saturday.

Police said the man was riding along Franciscan Road when the BMW travelling in the opposite direction turned right into Totterdown Street when the vehicles collided.

The teenager remains in intensive care.

The 22-year-old driver left before police arrived but was later arrested on suspicion of drink-driving and failing to stop at the accident scene.

He was questioned at a south London police station before being bailed to a date in January.

Officers from the Met’s Roads and Transport Policing unit are investigating the collision and have appealed for any witnesses to come forward.

Anyone with any information is asked to call the Serious Collision Investigation Unit on 020 8543 5157.