Call me a cynic, but I'm willing to bet the upcoming consultations on expanding Heathrow airport don't halt the government's madcap plans to lay tarmac all over west London. It's not that I don't trust the public to make the "right" decision; more that whenever the aviation industry asks the questions it gets the result it wanted, even if it contradicts every other survey.
Pro-expansion lobby group Future Heathrow recently published a Populus survey which shows surprising support for Heathrow expansion. They polled 1,000 residents from the west London boroughs that comprise the 2M group, and discovered 56% supported ending runway alternation (switching the runway used for take-offs at 3pm, to give locals respite from aircraft noise). This contradicted last year's ICM poll by the Mayor of London, which found only 26% supported ending alternation. Begging the question: why did the industry survey get the results it did?