London Ambulance Service crews were called to Bromley Road just before 6.10pm yesterday (January 3).
An ambulance crew, a medic in a fast response car, an incident response officer, and a clinical team manager also attended.
The person was pronounced dead shortly after.
We have contacted Metropolitan Police for further information.
A spokesperson for London Ambulance Service said: “We were called at 6.09pm on Wednesday 3 January to reports of a person unwell on Bromley Road, Bromley.
“We sent resources to the scene, including an ambulance crew, a medic in a fast response car, an incident response officer and a clinical team manager.
“We treated a person at the scene but sadly, despite our best efforts, they died.”