Police are continuing to appeal for witnesses following a fail-to-stop collision in Redbridge.
On Tuesday, 9 January, a silver BMW 330 Sport was in collision with a Vauxhall Vectra on the A406 Ilford Hill Flyover above the junction with A118 Romford Road and Ilford Hill.
As a result of the impact from the collision, the Vectra collided with two men who were standing at the side of the flyover next to their own car, which had broken down.
The two men, aged 46 and 45, were taken to hospital with serious injuries which resulted in the 45-year-old man having his leg amputated. They both remain in hospital.
The occupants of the Vectra - a driver and a passenger - were not injured.
The BMW stopped at the scene, however the male driver ran off prior to the arrival of emergency services.