MAYOR of London Boris Johnson has called on Prime Minister David Cameron to rule out Heathrow Airport expansion and a third runway beyond the next general election.

Following the removal of Justine Greening as transport secretary in Tuesday's cabinet reshuffle, Mr Johnson said it was time for the PM to "end the anxiety" over the airport by making clear that the government's pledge not to approve a third runway would not be ditched after the 2015 poll.

New Conservative chairman Grant Shapps took to the airwaves to insist that there remained an "absolute guarantee" of no expansion at Heathrow during this parliament, but Tory MP and environmental campaigner Zac Goldsmith said that Ms Greening's move made clear that the government was "opening the door" to the possibility of a third runway.

Any expansion of Heathrow would have implication across all of London and north Kent, not just the west of the capital, so what do you think about the possibility of a third runway? Do you think Heathrow needs to be expanded or are you against it?

There is of course still Mr Johnson’s proposal for a major new airport in the Thames Estuary on the table. Would you be in favour of this as a way to solve London’s aviation issues? Add your comments below.