Gatwick Route 4: Feedback opportunity on draft report of the Post Implementation Review

Closed 3 Feb 2020

Opened 6 Jan 2020

Published responses

View submitted responses where consent has been given to publish the response.


The UK Civil Aviation Authority (CAA) has now published a draft report of its Post Implementation Review (PIR) of Gatwick Airport Limited’s Route 4 RNAV-1 SID Airspace Change Proposal (ACP). You are able to find the draft report at

The ACP sought to replicate and eventually replace Gatwick Airport’s Route 4 departure route, using Performance-based Navigation (PBN) technology rather than the older radio navigation method. The airspace change was approved by the CAA on 14 August 2013 for implementation on 14 November 2013.

The final part of the CAA's airspace change process is a PIR. The purpose of a PIR is to determine whether the anticipated impacts and benefits in the original proposal and published decision are as expected. It is not a review of the decision itself, and neither is it a re-run of the original decision process.

Why We Are We Asking For Feedback

The CAA is now inviting stakeholders to comment on the draft report’s findings. The objective of this is to ensure that the CAA has not missed, misunderstood or misinterpreted any relevant matters. It is not an opportunity for new representations nor to go back over material that the CAA has already considered. 

Please note that the CAA is asking for comments on the draft report of our PIR, not about the merits of the original decision itself.


  • Residents affected by aviation
  • Organisations affected by aviation
  • Community groups
  • General Aviation
  • Commercial airlines
  • Airport operators
  • Air Navigation Service Providers
  • Industry representative bodies
  • Aerodrome Operators
  • Government departments
  • Regulatory bodies
  • Elected political representatives


  • Aircraft noise
  • Aircraft emissions
  • Local air quality
  • Flightpaths
  • Airspace design, categorisation and access
  • Airspace change proposals
  • Airspace investment
  • Air Traffic Control