Starting March 25, all general aviation aircraft will be required to have reserved slots for both landings and takeoffs at London Luton Airport. The privately owned airport insists that it does not want to discourage business aircraft but says that it has had to introduce the requirement to be able to “better manage the flow of ad hoc traffic.” Slots are already required for airline traffic, which has been growing steadily due largely to the boom in European low-cost carriers. Slots will be required at all hours and must be requested in advance from ACL, the company that manages slot allocation at many UK airports. More information is available from www.acl-uk.org. Slots are already required for general aviation traffic at the UK capital’s London City, Heathrow, Gatwick and Stansted airports. They are not required at Biggin Hill or Farnborough, and the RAF Northolt military base has its own slot process.