Detectives investigating a fail to stop collision in Osterley have today, Monday, 9 February, arrested a man in connection with the investigation.
The 28-year-old man attended a police station where he was arrested on suspicion of causing death by dangerous driving. He remains in custody.
The vehicle has also been recovered.
Police were called to the scene of a road traffic collision just before 05:00hrs on Sunday, 8 February at the A4 Great West Road, junction with Wood Lane, Osterley.
Officers attended and found that a 31-year-old male pedestrian had been in collision with a blue BMW on the west-bound carriageway. The vehicle failed to stop.
London Ambulance Service and London’s Air Ambulance also attended but the man was pronounced dead at the scene.
He has been named as Janusz Adam Partyka (3.08.83), who lived locally.
All next of kin have been informed.
A post-mortem examination will be held in due course.
Detectives would still like to hear from anyone who may have seen a blue BMW driving away from the scene heading west-bound towards Heathrow.
Enquiries are underway by officers from the Serious Collision Investigation Unit at Merton.
Anyone with any information is asked to contact officers on 020 8543 5157 or Crimestoppers anonymously on 0800 555 111.