Logic actually favours no expansion at all. The much quoted hub
airport
will do nothing for UK Plc other than put more money into the pockets
of
the airport owners and will be an enviromental disaster wherever its
located. But of course as soon as someone says this you get the usual
vested interests shouting them down saying they're anti business and
banging on about "growth".

So all those other countries/cities[1] which have developed 4-runway[2]
airports are stupid?

As if a constant increase in GDP is all
that makes a pleasant country to live in.

Could luck campaiging for votes on a manifesto of "let's stand still and
let the rest of the world get richer". You might be happy with the
prospect of the same per capita GDP (PPP) as, say, the average African
has currently but I doubt many others would.

[1] eg Paris, Frankfurt, Amsterdam, Tokyo, Madrid,
[2] in some cases more

--
Robin
reply to address is (meant to be) valid