Labour will drop its formal support for a third runway at Heathrow today in a significant U-turn that leaves the plan on a knife edge.
The party will announce that the £14bn scheme fails to meet the four key tests it established as a condition for parliamentary support.
It said that an analysis of the government’s national policy statement, the legislation that will pave the way for a third runway, showed that it failed to satisfy any of its targets on carbon dioxide emissions, noise, benefits to all regions and “ultimate deliverability”.
