Roads and Transport detectives are appealing for information and witnesses after a man was seriously injured following a fail to stop collision outside the Ace Café on the A406.
Police were called on Sunday, 13 August Police at 21:52hrs to reports of the collision on the North Circular Road.
Officers and London Ambulance Service attended and an injured man, a 65-year-old pedestrian, was conveyed to a central London hospital. He remains in hospital and his condition is described as critical but stable.
Next-of-kin are aware. The rider of a motorcycle involved failed to stop at the scene.
Officers from the Met's Serious Collision Investigation Unit are investigating.
Any witnesses, or anyone with any information, are asked to contact the Serious Collision Investigation Unit at Alperton on 020 8991 9555 or via 101 or Twitter @MetCC.
To give information anonymously call Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.
On Monday, 14 August a 34-year-old man was arrested on suspicion of failing to stop at the scene of an accident and causing serious injury by dangerous driving. He was taken to a Hertfordshire police station and later released under investigation.
Enquiries to locate the motorcycle involved in this incident are ongoing.