Police are appealing for witnesses and information following a fatal collision in Twickenham.
At 00:25hrs on Thursday, 5 October, officers discovered an overturned grey BMW on the A316 close to Godfrey Avenue.
The London Fire Brigade and London Ambulance Service also attended.
The driver, a man believed to be in his 30s, was pronounced dead at the scene at 00:52hrs.
Next of kin are in the process of being informed.
At this stage of the investigation, it is believed that the car was travelling westbound before coming to rest on its roof on the eastbound carriageway.
The road remains closed.
Detectives from the Met's Roads and Transport Policing Command are investigating. They would like to speak with anyone who was in the area at the time or who saw the grey BMW.
Anyone with information is asked to contact the Serious Collision Investigation Unit's witness appeal number on 020 8543 5157 or police via 101 or via Twitter @MetCC