News just in from Carol of the Airportwatch/Stop Stansted Expansion group of skullduggery afoot by airport owners BAA to influence their application to build a second runway there. Apparently BAA has recently resorted to 'encouraging' not only its own staff members, but also those of its many suppliers, to write in to the local Uttlesford District Council in support of its new runway proposal.

Actor Rula Lenska and journalist Rosie Boycott join other celeb mums in a vigil against Heathrow expansion in Parliament Square

As the date for the government's decision on Heathrow's third runway hurtles towards us (they'll be deciding in June or July, we think), a whole gamut of voices has been speaking out against the agenda for airport expansion that will destroy our chances of slowing climate change.

At the risk of sounding like a bad joke, an actress and a bishop (OK then, an archbishop) have both joined the fray, along with several celebrity mums and the head of the Sustainable Development Commission. Eclectic, eh? They're all calling on the government to shelve its plans for airport expansion.

Flashmob at Heathrow's Terminal 5 this morning

This morning saw the opening of Heathrow's new Terminal 5 to the public. Unfortunately for the aviation industry and government - who wanted this to be a chance to promote their case for airport expansion - a large section of that public is vehemently opposed to unsustainable aviation growth, and not afraid to show it.

So at exactly 11am this morning, hundreds of people stripped down to reveal identical "Stop Airport Expansion T-shirts", and to highlight the problems caused by airport expansion and unsustainable aviation growth. Pictures of the flashmob are coming in to our Moblog thick and fast. Scroll to the bottom of the page to see video footage of the event.

Image reproduced with kind permission of Private Eye Magazine and Clive Goddard.

Luckily for BAA, the Queen doesn't seem to have taken offence at apparently being banned from Heathrow in the run up to climate camp last year. This morning, she tootled off to Hounslow to officially open Heathrow's new Terminal 5 (although the public opening won't happen 'til the 27th).

You'd think being slammed for bad science, government collusion and involvement in reverse engineering a consultation in the space of a fortnight would be enough to give a company pause for thought.

Not BAA, who have just submitted an application to build a second runway at Stansted. The runway would add the equivalent of 11 million tonnes of CO2 to the UK's annual carbon footprint, bulldoze a thousand acres of countryside and make Stansted bigger than Heathrow is today.

Out and about on our Heathrow Voices tour last year.

If you're one of the many, many thousands of people involved in the opposition to Heathrow expansion, you may want to give yourself a pat on the back. The day after the 'consultation' closed, there's news that we're getting the message through to 'the highest levels of Labour'.

In one of two Heathrow stories in today's Evening Standard, the paper's chief political correspondent wrote:

Ministers are under increasing pressure to rethink plans for Heathrow expansion after 18,000 people lodged objections to the plans.

The scale of the protest is understood to have taken the government by surprise and is causing concern at the highest levels of Labour at the political fall-out if plans for a third runway are given the go-ahead.

A new report published today undermines the economic case for building a third runway at Heathrow Airport. It shows that the Department for Transport (DfT) based part of its case for expansion on an Oxford Economic Forecasting (OEF) study commissioned by BAA, the company who own and manage Heathrow.

Unsurprisingly, the BAA funded study over- estimates the benefits of a third runway, assuming it would generate an extra 3 million business passengers contributing £400 each to the UK economy (making it worth £5billion over 70 years) - the DfT's original estimate was for half a million new business passengers spending around £120 each.

All four leading candidates for the forthcoming London mayoral election have joined forces to fight Gordon Brown's push for a third runway at Heathrow Airport. Ken Livingstone, Boris Johnson, Brian Paddick and Sian Berry have all agreed to feature in a new anti-expansion advertising campaign launched today. The ad features in the Times, Guardian, Independent and Evening Standard newspapers.