Protesters have called on Birmingham International Airport to scrap plans for a second runway after a High Court judge criticised government proposals to expand airports in the south.
Friends of the Earth said the ruling was evidence the Department for Transport's entire aviation policy was flawed.
Mr Justice Sullivan found in favour of protesters in the South-east who were opposed to plans for a second runway at Stansted and the views of residents should be taken into account. The Government White Paper set out plans for a second "wide-spaced" runway at BIA at a specific location.
But the airport said it was already planning a full consultation with local residents.
MP Caroline Spelman (Con), who represents many of the residents likely to be affected by a second runway at BIA, said: "This High Court ruling could have significant repercussions for the proposal for a second runway at Birmingham."
She added: "The ruling found that the Government's disregard of local opinion is unlawful and that residents near Stansted must be given a say over where an additional runway is sited and how much land it uses."
Transport Secretary Alistair Darling accepted the judge's ruling but said the points were minor.