Boy are BAA keen on a third runway for Heathrow. Their enthusiasm knows no bounds, and there appear to be no lengths they won't go to to get their own way - purely for the good of the country, of course (even though they are Spanish owned) - no shabby profit motives involved.

So far in order to see their dream come true they have:

• colluded with the government (through a joint body - the Heathrow Delivery Group) to steer their plans through the consultation process
• supplied their own data for calculations of noise and pollution that inform the proposal, and prevented opposition groups gaining access it it to carry out their own analyses
• written parts of the consultation themselves
• drawn up a 'risk' list with the Department of Transport to counter opponents of the proposal (including the 2M campaign, the group comprising local councils representing 2 million people who'll be affected by the new runway)
• taken out an injunction against Airportwatch, the umbrella organisation who's members include such radical groups as the National Trust, the RSPB, the Woodland Trust and the Campaign for the Protection of Rural England, as well as ourselves.

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.

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:

This week's been busy for me, what with two demonstrations on two different campaigns. After the protest outside the Japanese Embassy, it was the Department of Transport's turn to welcome us. The government wasn't listening when we said NO to Heathrow's third runway last month. So this morning, we flashmobbed the Department of Transport and launched paper planes saying ‘NO AIRPORT EXPANSION' at transport secretary Ruth Kelly's office.