Expanding air capacity would show 'Britain is open for business'
We can and should expand aviation capacity in south east England. Doing so will send a much needed signal to people that Britain is open for business.
It is possible to expand Heathrow in such a way that it cements itself as Europe's number one hub, while significantly reducing the noise nuisance over west London. A four-runway airport would be straightforward to construct and relatively low cost by the standards of hub airports. It causes the lowest level of disruption to the wider economy of any likely airport expansion scenario.
– Tim Leunig, chief economist at the liberal think tank CentreForum