Detectives are appealing for information and witnesses following a collision in Regent Street.

Police were called by the London Ambulance Service at 21:06 on Saturday, 10 December to reports of a collision between a pedestrian and a bus in Regent Street at the junction with Conduit Street.

Officers attended and found 27-year-old man with a head injury. He was taken to a central London hospital where he remains in a life threatening condition.

The bus driver stopped at the scene. He was not arrested and is assisting detectives with their enquires.

Detectives from the Serious Collision Investigation Unit are investigating.

Anyone who witnessed the collision or has any information is asked to contact the Serious Collision Investigation Unit at Merton Traffic Garage on 020 8543 5157.