If I have my sensible hat on, Heathrow expansion was the only viable option. As I said last time I believe.
Despite the protestations of some of the more vocal Mancs officials, expanding Mancs (or Brum or anywhere else not London) is a waste of time - they are not at capacity, and are not London.
Gatwick isn't a viable passenger hub while Heathrow remains larger, and is too far out.
Stanstead would never get chosen as its currently London's emergency airport.
Passenger numbers at Luton are dropping like a stone, as nobody, rightly, wants to fly out of that shithole. Ever.
That said, I would have like to have seen a 2 pronged attack - full go-ahead permission at Heathrow, followed by a 2nd runway at Gatwick... ...because we have so many do-gooders, by the time Heathrow is done, we'll already be lagging in capacity. As always, line them up ready for shooting, come the mass cull.
And who cares about Harmondsworth? Its got an immigration centre, a couple of hotels, a really shite pub, and a few houses. Far mores disruption is being caused by HS2, but at least a runway is useful.