A public inquiry has begun into London Luton Airport's expansion plans.
Luton Borough Council, whose company Luton Rising owns the airport, approved the growth plans in December.
The separate private company that runs the airport, London Luton Airport Operations Limited (LLAOL), applied to increase passenger capacities from 18 million to 19 million per year and to amend the noise contours.
The government said an inquiry should review the main aspects of development.
Three inspectors are expected to participate during the inquiry, Richard Clegg, Sheila Holden and Geoff Underwood, the Local Democracy Reporting Service said.
A pre-inquiry meeting was held by the inspectors in the Council Chamber at Luton Town Hall in July to outline the management of the process.