A 25-year-old motorcyclist has died in a collision with a black cab.
He was pronounced dead at the scene and police say his next of kin have been told.
The driver of the black cab is helping police with their inquiries.
A passenger in the cab, in his forties, is in hospital being treated for a leg injury.
Police are appealing for information on the collision, which happened just after midnight in Hyde Park Street’s junction with Bayswater Road in Westminster.
Witnesses are asked to call 020 8543 5157, or Crimestoppers anonymously on 0800 555 111.