London needs a four-runway airport at either Heathrow or Luton if the UK wants to compete with Europe, according to a report by a think tank.
The Policy Exchange study says Boris Johnson's preferred option of a new hub airport in the Thames Estuary is not practical.
Emma Walden reports.
More top news
The London Mayor has made some forthright comments about Britons who have been lured to join Islamic State.
Bright spells with rain, sleet and snow showers at the weekend.
As soon as the information went missing in early January, the Ministry of Justice say they launched an urgent investigation.