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
Rashan Charles, 20, died after being apprehended by Metropolitan Police officers after running into a shop in Dalston, east London.
The House of Commons Commission will consider how long the bongs should be halted following concerns raised by a number of MPs.
The chimes are being stopped to allow extensive renovation work to the Elizabeth Tower, the Great Clock and its bell.