Future Heathrow, an umbrella group that covers organisations as diverse as the CBI, TUC, London First and airlines (who have taken out pro-expansion newspaper adverts today), are, shall we say, very much in favour of the new runway. They claim Heathrow is already operating at 99% capacity and point out that other major European airports have more runways: Frankfurt has three, Paris Charles de Gaulle and Madrid have four while Amsterdam Schiphol is frankly just showing off with six.
But residents and environmental campaigners are bitterly opposed to expansion plans - don't forget the Climate Rush picnic in Terminal 1 this evening - and it also looks like EU rules on pollution would stop the runway even if it's approved. So what's to do?
Enter Nick Raynsford and Boris Johnson. The Mayor is reported to be planning a legal challenge if the runway gets the go-ahead, and is pushing for the Thames Estuary airport as an alternative. He's now got the backing of a group of cross-party MPs, led by Raynsford, who are promoting the MARINAIR plan. The airport would involve taking off and landing over water and aviation experts have pronounced such a thing impossible, but Johnson is off the mark, getting the executive chair of Crossrail doing a feasibility study. Could we really be getting closer to an off-shore airport?