will never happen
The legal process will take longer than the election/fiscal cycle and there are more votes in No LHR expansion than for it so it's a constant temptation to politicians to do a Boris -and we all know how politcians are proof against temptation........
I strongly suspect we will not build any new civil runways in this country and we will have to figure out how to make the best of what we have now
Bigger planes carrying more people is the obvious answer