Guardian: The decision last week by Transport Secretary Geoff Hoon to delay a ruling on Heathrow’s third runway until early in 2009 has been cited as evidence of a possible government retreat from the project. That interpretation is premature. The plan to expand Heathrow has powerful backers, from the Prime Minister to British Airways, and from the CBI to major unions. All are likely to pursue its implementation with vigour. At the same time, the cabinet will have noticed opposition to the …