Aviation

"Yes Mr Brown, we're afraid it really is that serious..."

Much as Gordon Brown would like to pretend otherwise, getting the go-ahead for Heathrow's third runway is still far from a done deal. With the Tories and Lib Dems having already rejected the proposal, the PM is now facing a growing rebellion from within his own party. Labour MPs, privately egged-on by cabinet ministers, have tabled a motion opposing Heathrow expansion in a last ditch attempt to persuade Mr Brown to change his mind - reminding him that not only will the third runway make it almost impossible for the government to hit its climate change targets, but that it is deeply unpopular with voters.

45 Labour MPs have already signed up to an Early Day Motion expressing their opposition. If this figure continues to rise, as it easily could with two weeks still to go before the motion closes, then the PM will find it increasingly difficult to defy opinion within his own party.

I still suspect I may have fallen down a rabbit hole but apparently it's true. Two weeks after formally telling the world they're opposed to a third runway at Heathrow, the Tories have issued an extraordinary warning to companies. Don't get involved in any contracts to build the third runway, they're saying, because we're "absolutely determined" to stop the project going ahead. (Oh, and they're opposed to a second runway at Stansted too.)

The Independent Climate Change Commission has warned the government that it should cut all greenhouse emissions by 80 per cent by 2050 to tackle climate change.

In itself, this isn't particularly surprising; scientists have been recommending this for some time. More interesting - and very welcome - is that the commission wants to include aviation and shipping in the target. That means, for once, that 'all greenhouse gas emissions' pretty much means 'all greenhouse gas emissions'.

Greenpeace volunteers at Newquay airport in March 2007

You might remember that, 18 months ago, we set up ticket exchanges at airports across the country, and called on British Airways to show genuine leadership instead of launching new, unnecessary short haul routes that just add to the huge threat to our climate caused by runaway aviation growth.