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A senior Cabinet minister has claimed David Cameron will abandon plans to build a third runway at Heathrow.


International development secretary, Justine Greening, predicted that the Cabinet would conclude that the west London airport should not be expanded.


She called for a new “long-term” strategy to be drawn up to decide on a “sensible” future airport policy for the UK.


Her intervention, in an interview with the Telegraph ahead of this week’s Budget, risked a furious backlash and potential legal challenge from airport campaigners.


The Cabinet is still considering whether to proceed with a third runway at Heathrow or approve a rival development at Gatwick instead, after delaying a decision in December.


Greening was reported as saying: “I don’t believe that this government will proceed with a third runway decision. I just don’t think it is a smart decision.


“Trying to expand Heathrow is like trying to build an eight bedroom mansion on the site of a terraced house. It is a hub airport that is just simply in the wrong place.”


The MP for Putney, Roehampton and Southfields and a former transport secretary said she believed her fellow ministers would “reach the same conclusion”.


“The sooner that we can move onto working out a long term airport strategy for Britain the better,” she added.