True cost of Heathrow third runway must be revealed, say MPs

Justine Greening and Vince Cable among those saying plan would jeopardise spending elsewhere

The true cost to the public of building a third runway at Heathrow has not been spelled out to taxpayers, according to a cross-party group of MPs, who warn that domestic flight connections and other transport spending will be jeopardised.

Justine Greening, who quit Theresa May's cabinet in January, is among the MPs calling on the government to clarify what backing expansion at the London hub airport would mean, saying: "The transport secretary has a duty to spell out the true costs for taxpayers - and to be realistic about the benefits."