Expansion of Gatwick Airport

London Gatwick Airport is the secondary international airport serving London, England, and the second-busiest airport in the United Kingdom by total passenger traffic. Gatwick has undergone substantial expansion since its origins as an aerodrome; however, it remains one of the busiest airports in the world to operate with a single runway (though not the busiest), which continues to limit its growth. As a result, proposals for further expansion have been under consideration since the early 2000s.

Several options to expand Gatwick have been considered, including a third terminal and a second runway to the south of the existing runway. This could theoretically allow Gatwick to handle more passengers than Heathrow does today. If a second, wide-spaced (as opposed to close parallel) runway is approved, a new terminal could be sited between the two runways. This could either complement or replace the current South Terminal, depending on expected future traffic developments.