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UK – EU Transition, and UK Civil Aviation Regulations

To access current UK civil aviation regulations, including AMC and GM, CAA regulatory documents, please use this link to UK Regulation. Please note, if you use information and guidance under the Headings below, the references to EU regulations or EU websites in our guidance will not be an accurate information or description of your obligations under UK law. These pages are undergoing reviews and updates.

An Aeronautical Information Circular (AIC) (in the Pink (Safety) series) has been published detailing the legislation and procedures for notifying en-route obstacles to the Civil Aviation Authority (CAA). The AIC is available on the NATS Aeronautical Information Service (AIS) website.

Specific guidance for wind turbines is published in CAP 764: Policy and Guidelines on Wind Turbines. Crane users should also refer to CAP 1096: Guidance to crane users on the crane notification process and obstacle lighting and marking and the Crane notification page.

Please also refer to the UK Aeronautical Information Publication (AIP) section ENR 1.1 (available on the NATS AIS website) for details of how obstacles are notified to airspace users.

Notification to CAA Airspace Regulation

To notify new or existing obstacles, changes to existing obstacles and failures of aviation lighting, please complete and submit this notification form.

For existing obstacles and aviation lighting failures that have not already been notified to the CAA, you must notify us as soon as reasonably practicable. All other notifications should be made at least 8 weeks before commencement of the works (or, where there is an urgent need to commence the works or time does not permit the notification to be given at least 8 weeks before commencement of the works, as soon as reasonably practicable). During periods of high workload, we may be unable to process notifications made with less than the stated minimum notice.

After you submit the notification form, you will receive an automated email confirmation that the details have been received.

When the notification is received, it is assessed and appropriate engagement takes place with the relevant aviation stakeholders. Depending on the obstacle height/location, we may pass details to the relevant stakeholder for them to complete the assessment and notification processes. If clarification of the details is required, we will contact you via the email address that was provided in the notification form.

CAA Airspace Regulation output

Our output is likely to consist of the following:

  • Notice to aviation (NOTAM)

    Depending on the obstacle height/location, we may issue NOTAM to notify other airspace users. NOTAM are notices containing information concerning the establishment, condition or change in any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations. Further details of the NOTAM system are in the UK AIP section GEN 3.1 (available on the NATS AIS website) and in the UK NOTAM Guidance Material.

We will endeavour to provide a response. However, during periods of high workload, it may not be possible to respond to every notification. Valid NOTAM can be viewed on the NATS AIS website. When enquiring about the status of an outstanding notification, please always quote the reference number that you received in the automated email confirmation.
Subject to workload, we will respond by email to the address that was provided in the notification form. If the details are passed to the relevant stakeholder for them to complete the assessment and notification processes, you will be informed. Additional advice/guidance may be included.

CAA Airspace Regulation do not currently charge for this work. Full details of CAA charges can be found in the Scheme of Charges. If a stakeholder takes on the completion of the assessment/notification processes, charges may apply. In those circumstances, please directly contact the relevant stakeholder for further details.

Changes and cancellations

If your event/activity is changed or cancelled, please inform Airspace Regulation as soon as possible. If Airspace Regulation have already completed the assessment of the event/activity and provided you with a detailed response, please quote the activity reference number that was used in our email to you.

For changes, appropriate re-assessment and notification action will be undertaken. For cancellations, we will take action to cancel any output already published.

However, please bear in mind that, during periods of high workload, we may be unable to action changes/cancellations made at short notice.

Close Changes and cancellations

Contact us

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:


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