A red Jaguar XF car was travelling east in Broad Oak Road, towards the junction with Vauxhall Road, when it was involved in a collision with a man.
The collision took place at 7.50pm on Monday 25 January 2021.
The man sustained serious injuries and was flown to a London hospital.
Officers from the Serious Collision Investigation Unit (SCIU) are investigating the circumstances, and would like to hear from anyone who saw the collision or anyone with dash cam footage.
Witnesses are asked to call the SCIU appeal line on 01622 798538 or email [email protected]quoting DS/MD/006/21.