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UK Civil Aviation Regulations

These are published by the CAA on our UK Regulations pages. EU Regulations and EASA Access Guides published by EASA no longer apply in the UK. Our website and publications are being reviewed to update all references. Any references to EU law and EASA Access guides should be disregarded and where applicable the equivalent UK versions referred to instead.

Commercial displays and events

We offer guidance for the following:

Obstacle notification

Guidance on notifying new obstacles or changes to existing obstacles is available as follows:

Additional guidance on obstacles is available as follows:

Other notifications

Guidance on notifying other activities is also available:

Airspace co-ordination notices (ACNs)

For certain activities, we publish ACNs which detail the co-ordination arrangements that have been agreed with air traffic control to accommodate the flight/s. ACNs are also used to alert other airspace users about the activity. Please note that the issue of an ACN does not necessarily constitute permission to undertake an activity or grant access to Prohibited, Restricted or Danger Areas. Short-term ACNs are generally distributed directly to the relevant stakeholders but may also be listed on the Short-term Airspace Co-ordination Notices page. Long-term ACNs are published in the list of Long-term Airspace Co-ordination Notices.

Airspace restrictions

Guidance on UK airspace restrictions (and exemption requests) is available on our Commercial industry page


Civil Aviation Authority (CAA) Airspace Regulation need to be notified of any display, event or obstacle in the UK that may affect other airspace users. Our role is to:

  • Assess the potential flight safety implications of the proposal
  • Co-ordinate with key stakeholders to determine if any conditions/restrictions need to be imposed
  • Deconflict known activities
  • Appropriately notify the aviation community

For some types of activities, you will require a formal CAA permission or exemption.

If you have any questions, please contact Airspace Regulation between the hours of 08:30 and 16:30 Monday to Friday (excluding Public Holidays).  It may not be possible to action messages/notifications submitted after 16:00 until the next working day.

Planned periods of extended closure of the Airspace Regulation section will be notified here: