The marked police car pursued the Peugeot 308 after it triggered a "positive hit" on an automatic number plate recognition system, Scotland Yard said.
The force added that the police car had its 'blues and twos' in operation at the time of the incident.
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A 25-year-old man has been arrested in Newport, South Wales, in connection with the Parsons Green terror attack, Scotland Yard said.
A milder night ahead with some cloud low enough to be misty in places.
Tata Steel and Thyssen Krupp will formally announce the merger of their European steel operations on Wednesday, ITV News understands.