Not Long Now, brilliant post. Being part of the team trying to re-design the London TMA for the past 3 years, your words get straight to the main issues.
I can't see any Government actually agreeing to another runway at Gatwick or Heathrow never mind a new airport. Unfortunately the noise lobby, (interpreter, Tubby and pals), are so powerful that all the politicians are frightened to upset them, as are the Airport owners. Therefore we will continue with the mess, extremely well controlled as it is, that is the London TMA.