London Stansted airport is to spend £80 million ($120 million) on redeveloping its international terminal.
The project will include expansion of security facilities and enlargement of the departure lounge.
Extra security lanes will be added and a new "calm zone" installed after security. The departure lounge's retail area will expand.
The cost of the expansion - due to be completed in 2014 - will be split equally between Stansted owner Manchester Airports Group (MAG) and the London airport's "commercial partners".
The development is part of a wider £230 million investment programme to upgrade security, retail, and car-parking services at Stansted over the next five years.
MAG bought Stansted in from BAA in February, for £1.5 billion ($2.3 billion).