Officers were called to Brigstock Road at about 11.30pm to reports a car had collided with a man.
The driver of the vehicle, a 37-year-old man, was arrested on suspicion of driving offences.
He has been bailed to a date in mid-November.
The investigation is being led by officers from the Met’s Serious Collision Investigation Unit.
Any witnesses or anyone with any information is asked to call police on 020 8285 1574 or contact via Twitter @MetCC. Please quote CAD 8850/18Aug.