London Ambulance Service said it was called to King Street, W6, at around 5.30pm on Friday (August 22).
Crews including an ambulance, paramedics in fast response cars, an incident response officer, a clinical team manager and London’s Air Ambulance were sent, with the first paramedic arriving in under four minutes.
The woman was pronounced dead at the scene.
We have approached the Metropolitan Police for further information.
A London Ambulance Service spokesperson said: “We were called at 5.30pm yesterday (22 August) to reports of a road traffic collision on King Street, W6.
“We sent resources to the scene, including an ambulance crew, paramedics in fast response cars, an incident response officer and a clinical team manager. We also dispatched London’s Air Ambulance.
“Our first paramedic arrived on scene in less than four minutes.
“Very sadly, despite best efforts of our crews, a woman was pronounced dead at the scene.”
