Information and resources relating to the use of UK Airspace
The Government requires the CAA to secure the most efficient use of airspace consistent with the safe operation of aircraft and the expeditious flow of air traffic whilst taking into consideration the requirements of operations and owners of all classes of aircraft. Additionally environmental implications and national security issues must be considered.
Flights in UK airspace are operated in accordance with Visual Flight Rules (VFR) or Instrument Flight Rules (IFR).
Should weather conditions deteriorate below the proscribed minima for cloud and visibility, then Instrument Meteorological Conditions (IMC) exist and the flight must operate under more stringent IFR. For an aircraft to be flown within IMC, it must be:
IFR is, for the most part, mandatory within Class A-C airspace and an IFR flightplan must be filed. This enables the controllers to apply the required levels of separation to aircraft operating within controlled airspace and for traffic information to be provided to IFR traffic operating outside of controlled airspace so that the pilot can separate themselves sufficiently.
Airspace Use & Rules