The Cabinet reshuffle has put Boris Johnson on a collision course with the government over Heathrow Airport.
MP Justine Greening is out as Transport Secretary and the London Mayor believes that means the government is intent on what he calls the "simply mad" policy of a new runway at Heathrow.
He says he will fight "all the way". We have this report from our Political Correspondent Simon Harris.
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You can help keep an eye out for the capital's worst potholes by reporting them on an interactive map.