Heathrow delay: Circle of indecision goes onpublished at 10:06
Tom Edwards
Transport Correspondent, BBC London
If you think the public criticism about this Heathrow decision are harsh - you should hear what is being said in private.
We have been here before. In fact, no full length runways have been built in the South East since the 1940s.
Commissions and enquiries have come and gone for decades and no decision is reached.
In 2009 the Labour government gave a third runway the go-ahead as long as it was done within environmental limits. But the political will melted away. Sound familiar?
Now this government wants to look again at the environmental impacts.
The £20m independent Davies Commission which recommended Heathrow expansion has already looked at noise and Nitrogen dioxide levels using real time pollution data.
So it seems the government does not trust that report which judged it was achievable.
A Supreme Court ruling forcing the UK to comply with pollution levels may have something to do with it.
The more cynical will say it's pure politics to push this beyond the London mayoral election to boost the chances of the Tory candidate Zac Goldsmith.
But it makes you wonder about the political structure of the mayoralty and devolution. Straight away the political structure puts a hurdle in the way of a third runway.
Mayors of all parties are anti-third runway. Thousands of votes depend on it. And no mayor will get elected for the foreseeable future on a Heathrow expansion ticket.
So the circle of indecision wheels round again.