The BBC are reporting that a 2nd cyclist has been killed at the Bow Roundabout:
A woman, thought to be in her 20s, has become the second person in three weeks to be killed at a busy junction on a cycle superhighway in east London.
The victim was pronounced dead at the Bow Roundabout at about 16:45 GMT on Friday, the Metropolitan Police said. The crash also involved a lorry and the driver of this vehicle has been arrested on suspicion of causing death by dangerous driving.
Last month a 58-year-old man was killed in a collision with a tipper truck. Transport for London said at the time that he was the first person to be killed on the superhighway network.
Four priority lanes for cyclists have been painted blue around London, and another eight are due to open within the next four years.