Rachel Reeves is set to face down prominent Labour critics of plans to expand Heathrow, saying the need for economic growth trumps other concerns.
The Chancellor is expected to use a speech on growth next week to support the proposed third runway at the west London airport and endorse expansion at Gatwick and Luton Airports.
The plans will face fierce resistance from environmental groups and senior Labour figures including London Mayor Sir Sadiq Khan and Energy Secretary Ed Miliband have previously spoken out against a third runway at Heathrow.
Talk's Ian Collins says: "This could cause a big fallout!"
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