Police are appealing for witnesses and any drivers with dashcam footage following a fatal collision in Ickenham.
Officers were called at 23:24hrs on Monday, 18 May to reports of a collision involving a motorcycle in Swakeleys Road, Ickenham.
London Ambulance Service attended and a man, believed aged in his 30s, was pronounced dead at the scene.
His next of kin have been informed.
A second man – no further details – was taken to hospital for treatment; his condition is not life threatening. He has also been arrested on suspicion of causing death by dangerous driving.
Enquiries into the circumstances of the collision
Officers are keen to hear from anyone who was in the area and any drivers with dashcam footage to come forward and contact them.
If you can assist, please call the Serious Collision Investigation Unit based at Alperton on 020 8246 9820.