More doubt has been cast on the prospect of the so-called "Boris Island" Thames Estuary airport plan going ahead.
Favoured by London Mayor Boris Johnson, the estuary scheme, involving a new four-runway airport, is being studied by the Whitehall-appointed Airports Commission.
One of three reports prepared for the commission published today has said of the estuary plan: "Overall, the challenges to transition are considerable and amount to a significant cost and risk to the taxpayer in terms of commercial negotiations, infrastructure development and potential failure."
More top news
Tube bosses have made a new offer to drivers - to try to break the deadlock over the launch of the new Night Tube service
In an interview with ITV News, the Mayor said his 'sympathies were with the PKK' - a proscribed Kurdish terror group
Martin Stew has the forecast: