A Heathrow expansion U-turn by David Cameron would be an "off-the-scale betrayal" a Tory MP has said.
Zac Goldsmith, MP for Richmond Park & North Kingston, whose seat would be affected by a third runway, said the move would make voters question whether the Prime Minister could be trusted, and would be "catastrophic' for Mr Cameron's reputation.
Government-appointed Airports Commission is due to outline its initial thoughts in a report next week. Mr Goldsmith has questioned its independence and suggested that accepting its findings would, in effect, be supporting the expansion of Heathrow.
More top news
Services on major rail routes between London and south west England have been severely disrupted after a person was hit by a train.
The business executive, whose ruthless interviewing technique has won him many fans, is replacing Nick Hewer, who quit after a decade.
Recent opinion polls show Labour within striking distance of capturing the trophy seat of Finchley and Golders Green.