The argument that the 3 rd runway will reduce holding time is a false one, initially it may help but as BAA try to milk the runways for as much revenue slots as possible, it will quickly fill to capacity and you are back to square one.
I think a much better way of helping ease the capacity problems is provide financial incentives for airlines to invest in mini hubs away from London. And link them all with high speed rail. Germany started this in the 80s and look at their system.
Conservatives will bin it anyway next year
