The e-scooter rider - who was killed in an alleged hit and run with a car near Canary Wharf - has been named as Joshim Uddin.
The 32-year-old, from the Isle of Dogs, was riding along Manilla Street, in Docklands, on July 24, when he was involved in an accident with a blue Kia.
The driver of the car did not stop at the scene and it was found abandoned nearby.
He was rushed to a nearby hospital, but despite doctors battling to save his life he was pronounced dead less than three hours later.
A 42-year-old man was arrested on Tuesday on suspicion of causing death by dangerous driving.
He has been bailed to return on a date in late August.
Detectives are still appealing for witnesses to the incident or people who might have caught it on their dashcam.
Det Sgt Mark Palmer, of the Met’s Roads and Transport Policing Command, said:“If you were in the area at the time of the collision and have dash-cam please check your footage and share with us anything you find that might relate to this collision.
“We are still piecing together the circumstances surrounding the incident – if you can help us please do get in touch.”
Under the current legislation, the riding of private e-scooters on the road or in a public place remains illegal.
An e-scooter trial - which would legalise private vehicles - could take place in the spring in the capital.
Any witnesses or anyone with dashcam footage that may assist are asked to call the Roads and Transport Policing Command on 020 8597 4874 or call police on 101 quoting CAD 5622/24JUL.