Boris Johnson has insisted he won't allow a third runway to be built at Heathrow Airport, amid speculation that senior Tories want to revisit the idea.
The Conservative Mayor of London, fighting for re-election in May, says the move would be "intolerable" for people in the west of the capital.
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Police in Southwark are appealing to the public for help in finding a teenage girl missing from Bermondsey.
Over 40,000 people picked up their packs to take part in the annual marathon in the capital.
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