Police are appealing for witnesses following a collision in Ealing.
Police were called by the London Ambulance Service shortly before 09:00hrs on Friday, 4 August to a collision involving a motorcycle on Greenford Road in Ealing.
Officers and London’s Air Ambulance attended.
The male pillion passenger was taken to a central London hospital where he remains in a stable condition; his injuries are not believed to be life-threatening.
The rider left the scene prior to police arrival.
Detectives from the Met’s Roads and Transport Policing Command are investigating.
Anyone who witnessed the collision is asked to contact police via 020 8991 9555 or via Twitter @MetCC