On aviation, I've made it clear many times, I don't think Heathrow represents the answer. I think the Prime Minister understands that. I think it would be totally wrong to expand an airport slap-bang in the middle of London's western suburbs.
It would have very damaging environmental effects and even if you were to put in a third runway it would rapidly run out of usefulness.
It would not serve London's needs in the long term. You need a bolder solution and that's the one that we're advocating.
David Cameron has been challenged by senior backbencher Tim Yeo to show whether he's a man or a mouse over expansion at Heathrow.
The Coalition will keep its pledge not to build a third runway at Heathrow Airport despite renewed pressure, Downing Street said.