Police were called at 11:32am on Thursday, 4 August to reports of a collision at Shepherds Hill.
Police and London Ambulance Service (LAS) attended. At the scene a Mercedes car had been in collision with a motorcycle.
Despite the efforts of medics, a 28-year-old male motorcyclist was sadly pronounced dead at the scene at 12:04pm.
Next of kin have been notified and are being supported.
The driver of the car stopped at the scene and is assisting police with their enquiries. He was not arrested.
Detective Constable Liz Carrey of the Met’s Serious Collision Investigation Unit said: “While our enquiries continue we would still like to hear from anyone who either witnessed this incident or has dash-cam footage.
“We are building a picture of the circumstances surrounding the collision and urge anyone with information to get in touch.”
All road closures have now been lifted.
Anyone who witnessed this incident or has dash-cam footage can call the dedicated witness line direct on 020 8597 4874, call 101 or Tweet @MetCC quoting 2973/4AUG.