Stansted Airport Expansion

No, No, No. All that money (where is it now, still around £2billion with contingencies for cost overrun though it will probably overrrun more?)
Spend it on high-speed airport to airport rail links based on the Japanese bullet train - at 300kph it will take little more than an hour to get from Heathrow to Durham Tees Valley, about the same time as from Heathrow Terminal 1 to Terminal 5.

Benefits: relieves the pressure on the London airspace, reduces (to nil) internal flights, makes the North Esst the first port of call for foreign businessmen