A House of Commons Transport committee report has rejected the Mayor's plans for a new hub airport in the Thames Estuary - saying the public expense would be too great.
MPs also say transport infrastructure wouldn't cope and wildlife habitats would be affected. Instead, it urges the Government to allow expansion at Heathrow with a third, and possibly fourth, runway.
But not everyone's convinced.
John Stewart from the Heathrow Association for the Control of Aircraft Noise and Louise Ellman from the Commons Transport Select Committee.
Emma Baker interviews travel expert Simon Calder after Boris Island airport ideas are rejected by MPs
Plans for a new island airport off the Essex coast have been rejected by MPs. Members of the Parliamentary Transport Committee say the proposals, backed by London Mayor Boris Johnson, are unworkable without public investment and would also have an impact on wildlife in the Thames estuary.
The committee also recommended at least one new runway at Heathrow and better rail links to Stansted Airport in Essex. Emma Baker spoke to travel expert Simon Calder asking him what the news means for our other airports in the East.
Boris Johnson has defended his idea of building an island in the Thames Estuary, saying that a third runway at Heathrow would be "obsolete" by the time it was built.
He added that today's report made plain that advocates of this solution were effectively calling for a four-runway Heathrow, which he said would be "environmentally and politically undeliverable".
Plans for a new island airport off the Essex coast have been rejected by MPs.
Members of the Parliamentary Transport Committee say the proposals, backed by London Mayor Boris Johnson, are unworkable without public investment and would also have an impact on wildlife.
The committee also recommended at least one new runway at Heathrow and better rail links to Stansted Airport.
The House of Commons Transport Committee has said, in a report today, that the government should reject the Thames Estuary airport plan and expand Heathrow instead.
The plans for a new hub airport east of London, favoured by London Mayor Boris Johnson, are described as far too expensive.
Hounslow Council opens consultation with people affected by airport expansion
Consultation is about to begin between Hounslow Council and residents and businesses that will be impacted by planned expansion at Heathrow Airport. Hounslow is the borogh most affected by noise from the airport as it lays directly under both main approach paths.
Stansted's owners are keen to attract new business Credit: Press Association
Stansted Airport has signed a new deal which will see Air Moldova move its UK operations from Gatwick to Essex.
Stansted has recently been taken over by Manchester Airports Group which is keen to increase the number of passengers passing through the main terminal.
Air Moldova will begin twice weekly flights to Chisinau International Airport on 29th April.