Heathrow's computer generated video of the options for the 3rd runway.
Heathrow has revealed three options for a 3rd runway which they call "a new approach". Its Chief Executive Colin Matthews says a 3rd runway is essential for the UK.
Boris Johnson has insisted he won't allow a third runway to be built at Heathrow Airport, amid speculation that senior Tories want to revisit the idea.
The Conservative Mayor of London, fighting for re-election in May, says the move would be "intolerable" for people in the west of the capital.