Plans to upgrade the railway station at Gatwick Airport are being brought forward to reduce congestion in time for the 2012 London Olympics.
The changes to the concourse layout and improvements to information screens and help points are part of a £53m upgrade at the West Sussex airport.
Floor, ceiling and wall tiles and lighting will be renewed as part of the work expected to begin early in 2012.
Network Rail said Gatwick was one of 10 rail projects under way for the games.
Building work was to have started in Autumn 2012, along with the rest of the improvements.
They include a new platform designed to ease the bottleneck at Gatwick for services on the Brighton mainline.
There will also be a new, escalator and lift and upgrades to track and signalling to improve performance and reliability of trains using the station.
The work, expected to be completed by the end of 2013, is being funded jointly by Network Rail and the airport.