The incident happened in High Street, Bromley just after 1pm today (May 16).
An ambulance crew from the London Ambulance Service, a paramedic in a fast response car, an incident response officer, and an emergency responder attended.
The man was treated at the scene before being taken to hospital where his condition is unknown.
We have contacted the Metropolitan Police for further information.
A spokesperson for London Ambulance Service said: “We were called at 1.04pm today (16 May) to reports of a person unwell on High Street, Bromley.
“We sent resources to the scene, including an ambulance crew, a paramedic in a fast response car, an incident response officer and an emergency responder.
“We treated a man at the scene before taking him to hospital as a priority.”
