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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.


The last iteration to be accepted into the CAA’s Airspace Modernisation Strategy (AMS) was Iteration 2 in January 2022.

Since then, we have accepted Airspace Change Organising Group (ACOG)’s proposed ‘clustering’ approach to master plan development, grouping proposals geographically.

Following a public engagement exercise, ACOG expect to submit an Iteration 3 covering the Scottish cluster for assessment in early 2024. This will be followed by the remaining clusters in due course.

Next steps

Prior to the submission of Iteration 3, ACOG is required to run a public engagement exercise to gather the views of individual stakeholders on the development of the master plan at a strategic level. This engagement exercise supplements the CAP 1616 consultations for each airspace change proposal.

More information about ACOG’s engagement can be found on acog.aero. ACOG also distribute a quarterly newsletter which you can sign up to here.

The masterplan so far

A high-level chronology of the master plan commission and development year on year can be found below:



The CAA published an updated addendum to the Iteration 2 acceptance decision (CAP 2312A Addendum) that accepts:

  • ACOG’s advice on the withdrawal of Cardiff Airport from the masterplan.
Close 2024



The CAA published an updated addendum to the Iteration 2 acceptance decision (CAP 2312A Addendum) that accepts:

  • ACOG’s advice on the withdrawal of Aberdeen Airport from the masterplan.
Close 2023



We published updated versions of CAP 2156a (Masterplan acceptance criteria) and CAP 2156b (Masterplan assessment framework).


The CAA published an addendum to the Iteration 2 acceptance decision (CAP 2312A Addendum) that accepts:

  • ACOG’s proposed approach to managing interdependencies between airspace changes (the ‘cluster’ approach), and
  • ACOG’s advice on integrating a new Farnborough airspace change proposal into the masterplan.


The co-sponsors accepted Iteration 2 of the masterplan and published an acceptance decision (CAP 2312A).

Close 2022



ACOG submitted masterplan Iteration 2 of the Airspace Change Masterplan (CAP 2312B) to the co-sponsors for assessment.


CAA published the Acceptance Criteria (CAP 2156a) and the Assessment Framework (CAP 2156b) of the masterplan.


Co-sponsors wrote to NERL to extend the masterplan commission to cover the rest of the UK.

Close 2021


February – June:

CAA sought feedback on proposed Criteria for Assessing and Accepting the Airspace Change Masterplan (CAP1887).


Publication of masterplan Iteration 1: Co-sponsor assessment (CAP1884).


ACOG was established.

Close 2020



NERL submitted masterplan Iteration 1.


Co-sponsors wrote to NERL to confirm the iterative approach and the contents of Iteration 1 of the masterplan; plans for future iterations; and how they will assess the first iteration.

Close 2019



Co-sponsors commissioned NERL to draw together a coordinated implementation plan for airspace changes (or airspace change masterplan) in Southern England and, as part of this role, create ACOG that will develop it as per the NERL Air Traffic Services Licence Condition 10A.

Close 2018