Greenpeace and WWF-UK among campaigners launching challenge that could see decision on third runway quashed
Department for Transport presentation states that airport operator is not expected to file planning application ahead of next election
Green groups argue falling passenger numbers undermine case for airport expansion
Chorus of disapproval over Heathrow expansion becomes more vocal as Lord Smith joins Boris Johnson and senior Labour MPs in voicing opposition to third runway
Third runway will be granted approval, but government throws in high-speed rail link as "green sweetener"
Both Eurostar and Spanish rail network release new figures suggesting travellers increasingly prefer high-speed rail to flights
Boris Johnson has confirmed he will back and fund legal fight by alliance of London councils is third runway gets green light
Brussels to sue over PM10 breaches in move that could prove first step in wave of legal actions
Plans for 200mph rail lines centred on new Heathrow hub seen as green " sweetener" for third runway
Prime minister to force through approval for Heathrow expansion despite ministerial objections