Detectives believe they have now recovered all the vehicles used as part of the get-away plan by the gang who were responsible for Thursday's 'smash and grab' raid on London's Selfridges.
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The problems appear to have been caused by a power supply problem in Queen's Park in north west London, which has affected signalling.
Cloudy conditions continuing overnight, with some patchy outbreaks of rain.
The mayor has revised his proposals for a six-mile East-West cycling superhighway in a bid to cut traffic delays.