Britain's competition regulator has affirmed a preliminary ruling that BAA, the owner of Heathrow airport, most dispose of London's Stansted airport and one Scottish airport.
The Competition Commission said Tuesday that it saw no reason to change its preliminary ruling in March, which it said was the right decision for air travelers. The ruling also requires BAA to sell either its Edinburgh or Glasgow airport in Scotland.
It says the sale process should start within three months.
BAA, owned by a consortium headed by Grupo Ferrovial of Spain, had fought a long regulatory and legal battle against being forced to sell. It says it will consider contesting the latest ruling in court.