I'm all for the building of a new airport at the mouth of the Thames. I was joking with a friend the other day that Singapore would have completed both Terminals 4 & 5 with a third runway before Britain would even finishing arguing if expanding Heathrow is justified.

People should see that Heathrow just cannot expand beyond to what is already been expanded. Its like Hong Kong's Kai Tak. Take the opportunity now and build a new airport.