Greenpeace welcoming the opening of the new international terminal at St Pancras last year © Will Rose/Greenpeace

Almost a year ago to the day, we went along to St Pancras to welcome the opening of the new international terminal with an enormous Yes! banner. Our point was of course that the UK doesn't need new runways, we need new high speed rail links; then, as now, there were at least 100,000 flights a year between Heathrow and destinations easily reachable by train.

Since then, the Tories have not only opposed the third runway at Heathrow, they've also warned companies that they "should be very, very careful" about getting involved in any contract for a third runway as the Tories were "absolutely determined" to stop the project.

With the decision on Heathrow’s third runway expected this year (honest), the atmosphere in Westminster is heating up.

Both opposition parties have come out strongly against the third runway; rebel Labour backbenchers are increasingly joining the opposition; there are signs that the cabinet is split over the decision; and the new transport secretary Geoff Hoon has called for a parliamentary debate on Heathrow expansion next Tuesday.

All of which means there are now two new opportunities for us (by which I mean you…) to intervene and make the opposition felt in the corridors of power.

Flashmob at Heathrow's Terminal 5.

Upcoming events for all those opposed to further airport expansion:

• 16 Nov: Direct Action Training in West London

• 17 Nov: Public Meeting in Chiswick

• 29 Nov: 'Are you listening Gordon?' Stunt in Hounslow

• 6 Dec: National Climate March

"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.)

While the preservation of civil liberties is an ongoing struggle (the government's ID database plan is one I think is definitely worth challenging), we've still come a long way in the last 100 years.

Back then in the days of empire, Britain might have straddled the world but women had no voting rights and it was only thanks to a group of determined women waging a persistent (and sometimes violent) campaign of direct action that, in 1928, the government finally passed a bill granting equal voting rights to both sexes.

Greenpeace saying Yes to the new high speed rail link to Europe last November © Rose/Greenpeace

We've been hearing likely sounding noises for a while now but today, the Conservatives have formally announced that they'd say no to a third runway at Heathrow, and yes to a high speed rail link between London, Birmingham, Manchester and Leeds instead.

And so I find myself a bit befuddled to be wholeheartedly agreeing with a Tory party spokesperson, Theresa Villiers. She said:

Gordon Brown's been in some sticky situations over his Heathrow expansion policies but yesterday he found himself super-glued to the sticky hand of Plane Stupid activist Dan Glass.