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Dramatic helmet-cam footage shows a brave motorcyclist chase a gang of moped riders through central London traffic after they stole a man's phone.
Two people were on each moped as the drivers weaved past stationary cars and vans and tried to make their way through the capital.
At first, the motorcyclist who filmed the incident had no idea that they had just taken a phone.
But he saw the two scooters riding on the pavement and going through red lights so decided to switch on his helmet camera and follow them.