From the 1st of May 2009 Iceland Express will be flying to Reykjavik from London Gatwick instead of London Stansted - a route it has served for six years.
BA / GB Airways used to fly from Gatwick to Reykjavik but the route has been unserved for about a year.
According to Iceland Express there are two reasons for the switch. Firstly, their sister airline Astreaus who operate flights for Iceland Express which is a "virtual airline" is based at Gatwick. The second reason is that they consider Gatwick as a more convenient hub for their passengers.
For British customers of course it just depends where you live. It's all very well saying that Gatwick is closer to central London but most people don't actually live in central London !