We need 2 new runways, they need to be near Heathrow because the airport staff live near there and that is where passengers want to fly to.
I was watching the film Midway over Christmas and noticed that the Japanese aircraft carriers were ordinary ships with runways stuck on top. This gave me the idea that 2 runways could be put on top of the 2 already at Heathrow. Planes taking off would use the lower runways and planes landing would use the upper runways. This would solve the runway capacity problem
Is this a daft idea and has anyone already thought of this?