Baltasound
Most thinking people of the country do care whether Heathrow is adequate or not..If the lack of a third runway is holding the UK back, or giving an advantage to EU states..Then without question, most would back a third runway.
The Lib Dems aren't against the expansion of Heathrow for the sake of it, they are against it for the very good reason that (the airport) is in the wrong place
The Liberals are against a third runway, simply because they are a Green/Left of Centre party opposed to any development that does not comply with their narrow criteria.
Bottom line is there is not enough capacity at Heathrow, there are delays that are not acceptable and soon business will head Eastwards.
We have two options..A third runway at Heathrow, or a completely new London airport.
A third runway would be avaiable much sooner, and would be far cheaper.
Some may not like this..IMO sooner rather than later, a third runway at Heathrow is going to happen.