What I don't understand, is why at the worlds worst airport they believe they need another runway. I know that it is believe that anything North of London isn't really England. But I do think we should be looking at developing a real hub designed in similar standards to Schiphol or Singapore Changi or Hong Kong. Airports that have actually been designed to be a hub, rather then adding a bit here and there. Terminal 5 is just awful, and I cannot understand why they didnt have a look at other countries where they have had success.
My belief is that there is no need to develop Heathrow, but more so to develop a hub somewhere North of London with some space to expand and designed properly from the outset.