The solution is very, very easy. Have a national referendum on flying. If you agree that the Government should be given a mandate to expand any airport as necessary to meet demand, then you vote yes and in return you get a yes stamp in your passport and can use any UK airport. If you don't have a yes stamp then you are banned from using any UK airport. I think you will then find the number of Nimbys will diappear at the thought of losing their winter skiing, regular stag weekends, not to mention their two weeks on the Costa Del Slaughtered.
I use aircraft and fly, hate the regular long delays where Heathrow and Gatwick runway capacity are running at near to 100% and want my airport where they are quick and easy to reach, which isn't Stansted or Luton or anything further afield. I have used Luton several time over that last few years even though it is more difficult to get to but I don't suffer hours of delays if the aircraft was slightly late landing or turning around and missed it's takeoff slot so you have to wait 6 hours for another one!
Boris estuary will NEVER happen and is like Stansted and Luton, the wrong side of London, with long journey times from the second richest wealth creating area after London in the UK. The M3, M4 corridor. Heathrow is successful and needs to be expanded where it is an airport in the right place for 10's of millions of people to get to very easily. Those that support Boris Island have you thought about all the housing and infrastructure needed for the 100,000+ direct and indirect employees that currently work at heathrow, the logistics of moving them and the effects on the communities they would leave, including house prices. Plus, Schiphol means it will be fine as long as you don't use it for aircraft takeoffs or landings towards the east as they have already stated, they will keep and enforce, here before you rights to that airspace.
Where I am we get quite a lot of aircraft noise from Heathrow, it is the price of convenience, likewise the traffic noise where I live near a main road, having neighbour noise where I live in a town etc, etc. If you want a quiet life, the Scottish highlands have much to commend for such peace, but don't expect less than a 50 mile round trip for your nearest supermarket, pub, restaurant, pub, doctor and dentist, all of which are within a few 100 metres from where I live. Nothing in life is free, which any engineer and scientist will tell you, what you gain from this design, you will lose from, this, this and this. Nature and life are like that, make your choices and accept the compromises.
As I've stated before, turning Farnborough into an International airport is fine by me.