Heathrow alternative between Chalgrove and Benson?!
Seeing as everyone is sitting on their backsides, unable to make any decision on LHR's third runway, perhaps they open up the can of worms again and look at plonking another Heathrow-sized airport slap bang between Chalgrove and Benson, joining those two with the new two runways in the middle making up a four runway hub, just 29 miles from Heathrow, and importantly, the right side of London.
Could argue that it would upset the least amount of people (aside from Watlington and Wallingford residents) for any new build airport (3 mile by 2 mile block of land) in the north west quadrant within 30 miles or so outside of greater London.
Chalgrove and Benson strips take the regional airline services and the two new runways in the middle, the long-haul. Link with the HS2 line beyond Chinnor, big roads to junctions 6 and 7 on the M40, job done.
Pipe-dream, but has lots of merit on lots of fronts - environmentally more acceptable than current Heathrow, the right side of London, not so far from London.
Establish a maglev connection to the city at up to 300 mph and it all starts to look good. Just need about £30 billion or so.....
If none of that works, wait for the MOD to sell off Benson to developers and we'll establish a nice little regional airport 30 mins from the M25.