Detectives investigating a road traffic collision in Morden are appealing for the driver of a black Toyota Corolla to come forward.
The driver - who is being treated solely as a witness - is believed to have seen the moments prior to the collision. They were driving towards the Rosehill roundabout.
Police were called at 02:12hrs on Tuesday, 25 September, to a car in collision with a tree on Bishopsford Road in Morden.
Officers attended along with London Ambulance Service and London Fire Brigade.
The driver of the car, a 33-year-old man, was pronounced dead at the scene.
His next of kin have been informed.
We await the results of the post-mortem examination.
Enquiries into the circumstances continue however, it is not believed that anyone else was in the car or any other vehicles were involved.
No arrests have been made.
Anyone with information is asked to contact the Serious Collision Investigation Unit on 020 8543 5157 or 101 quoting CAD 495/25Sep.