Sounds like a non-story to me. There isn't going to be a third runway at Heathrow, and there isn't going to be a change of leadership - neither in the foreseeable future.
I think we'll have to wait until 2015 before we can get rid of Cameron, which will be much better as we can get rid of the entire government at the same time :-)
Seriously, the coalition would never survive a change of Tory leadership, and the only thing likely to save them from defeat at the next election is a change of chancellor or economic "policy"