Airport expansion in the London area is firmly back on the political agenda, having been kicked into the long grass by the present coalition government when it took power.
Meanwhile, saturated London Heathrow's desirability as a major hub on the world's great trunk routes is under threat, and there are signs of panic in government ranks as the significance of this for the UK economy dawns.
Politically, all options are now back on the cards, including a Thames Estuary location for a massive Heathrow-replacement airport. But the option of a Third Runway at Heathrow is still there, looming dangerously because it is the quickest, cheapest workable solution to London's increasingly dire runway capacity shortage.
And the longer the government dithers, the more attractive the third runway option will become, until it becomes completely inevitable.
The nightmare scenario is that the Third Runway is given the go-ahead, but as a temporary solution while a massive Estuary Hub - and all the transport links to it - is created.