Policy for the Classification of UK Airspace

This document sets out the Civil Aviation Authority’s policy for the classification of UK Airspace. It describes how the airspace classification system detailed within SERA.6001 (transposed from ICAO Annex 11 section 2.6) may be applied within the UK.

The CAA has published a revised version of CAP 1616, Airspace Change Process, which implements the latest government policy set out in the Air Navigation Directions 2026 and the Air Navigation Guidance 2026. These changes come into effect on 1 October 2026 and this publication will be updated in due course to reflect any relevant changes.