Heathrow plans criticised by MPs

Opponents believe they can stop the project from happening

Building a new runway at Heathrow would have an "unacceptable" impact on local communities and the environment, the Conservatives have said.

Opening a Commons debate on the plans to expand Heathrow, shadow transport secretary Theresa Villiers called for a "better, not bigger airport".

Transport Secretary Geoff Hoon accused the Tories of "political opportunism".

Earlier, Labour MP Andrew Slaughter quit his government post in protest to campaign against the proposal.

Mr Slaughter stepped down as an aide to Foreign Office minister Lord Malloch-Brown, saying he believed the