Edinburgh does have slots of a sort. It is designated as a schedules facilitated airport, at which airline operators file their schedules into the Airport Coordination system and may be asked to make voluntary timing changes to alleviate congestion. Although they are not subjected to the same onerous restrictions as at major slot coordinated airports like Heathrow or Gatwick, schedules filed at airports like Edinburgh, Glasgow and Bristol are still visible to other airline operators, handling agents and the like. In most cases, schedules data submitted by airlines into the Airport Coordination system will drive the departures and arrivals screens at the respective airports.