This week's events suggest that air quality - or pollution - is likely to be the first stumbling block for Heathrow expansion, as I argue in a piece on Open House this afternoon.
But - as I said earlier - don't forget the noise nuisance.
Meanwhile, the five Plane Stupid activists who climbed onto the roof of parliament and unfurled anti-expansion banners have been found guilty. The activists were publicising the fact that the Department for Transport had colluded with Heathrow owner BAA to fix its figures. That was mentioned several times inside parliament on Tuesday.