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A Post-implementation review is conducted at Stage 7 of the Airspace Change process for CAP 1616 and CAP 725 airspace change proposals. The purpose of the PIR is to enable the CAA to consider whether the anticipated impact and benefits of the change have been delivered. To inform this review, which usually takes place 12 months after the change has been implemented, the change sponsor is required to commence the collection of data on the impacts of the change as soon as the change is implemented and to collect a year of data. The data is used to enable a comparison to be made between pre and post implementation operations. A year of data is required to provide data on all operating conditions which change over the seasons. Indicative PIR data requirements are listed in CAP 1616 and include impact on airspace users, those on the ground and any environmental impacts.
The current pandemic of COVID 19 has seen a dramatic reduction in aviation activities. This global reduction in aircraft movements means that airspace use since March 2020 is unrepresentative of previous years Data collection during this period for the purposes of a PIR would in our view, be unlikely to provide a robust data set against which to conduct that PIR. COVID 19 pandemic has also resulted in a degree of uncertainty within the aviation industry with displacement of aerodrome and Air Navigation Service Providers staff due to initiatives such as the Governments furlough scheme who would normally be undertaking the PIR data collection activity as the airspace change sponsor. Until we have more certainty on the level and behaviour of airspace movements going forward and to better enable airspace change sponsors required to undertake the evidence collection of the data set to business plan ahead, we will suspend the requirement to collect PIR data for those airspace change proposals currently in Stage 7 which fall into the criteria listed below in points 2 to 4 inclusive.
This statement does not apply to the PIR of CAA Decision CAP 1678 – Farnborough Airspace change (see separate information on the Farnborough Airspace change webpage here) but applies to all other PIRs.
Any Change sponsors with queries regarding the above should contact the CAA at Airspace.Policy@caa.co.uk.
These requirements will be subject to review as required and no later than February 2021.
Post implementation reviews provide a rigorous assessment by us, as the independent regulator, of whether the
anticipated impacts and benefits, set out in the original airspace change proposal and decision, have been delivered
and if not to ascertain why and to determine the most appropriate course of action.
The review can be an iterative process and the nature of each review will be determined by the scale and impact of
the airspace change itself. The main stages are shown below.
1. We determine the scope and objectives of the review after discussion with the organisation that requested the change.
This may include:
• A review of what was to be achieved by the change
• Air traffic control/management requirements (safety, delay, capacity efficiencies)
• Military air traffic control/management requirements (if applicable)
• Environmental conclusions
• Effectiveness of the change
• Other benefits or impacts
• Operational impact (feedback gathered from all affected aviation stakeholders)
• A post implementation safety analysis.
2. We identify and confirm the data required from the organisation that requested the change.
3. We may, during our assessment phase, revise the scope and objectives of the review.
4. We may request further information from the organisation that requested the change at any time prior to publication of the report.
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