7 July 2026
The Ministry of Defence has begun the airspace change process for what could become the first step towards replacing the UK’s familiar Military Aerodrome Traffic Zones (MATZ) with a new form of regulated airspace.
The proposal, sponsored by the MoD on behalf of the USAF-operated bases at RAF Lakenheath and RAF Mildenhall, would introduce a Temporary Mandatory Transponder Zone (TMZ) extending to 10,000ft in order to contain IFR and visual procedures associated with the two aerodromes.
While the current proposal relates only to a trial, the accompanying Airspace Change Proposal (ACP) documents make clear that it forms part of a wider programme to modernise military terminal airspace around UK military aerodromes. The CAA has previously indicated that any wider replacement of MATZ remains some way off, making this proposal one that is likely to attract attention well beyond East Anglia.
The proposal is being progressed as a trial under the CAA’s fast-track process, allowing the trial to be established more quickly than a permanent airspace change. According to the ACP timeline, implementation is currently targeted for October 2026.
That timetable has already prompted questions from some within General Aviation about whether there will be sufficient time to ensure pilots are aware of the changes. Because the trial would be notified by AIC or SUP rather than appearing on annually published charts, pilots relying primarily on paper charts would need to ensure they check NOTAMs and briefing material carefully before flight.
Questions have also been raised about stakeholder engagement. The ACP identifies several aviation organisations, including the British Gliding Association, British Microlight Aircraft Association and British Hang Gliding and Paragliding Association, but some observers have noted the apparent absence of other major GA representative bodies such as the Light Aircraft Association, AOPA UK and the General Aviation Awareness Council.
The ACP also states that the proposal is expected to result in “significant change to the distribution of traffic” for microlights, gliders, hang gliders, paragliders, paramotors and balloons, while concluding that these aircraft have minimal environmental impact because they are either unpowered or small and efficient.
Exactly what the eventual airspace design will look like remains to be seen. The current documents describe the concept rather than the final design, and consultation on the detailed airspace structure has yet to begin.
However, with the MoD explicitly describing the project as part of a wider programme to modernise military airspace, the outcome of this trial could prove significant for military aerodromes across the UK. If successful, it may provide a template for similar proposals elsewhere, potentially signalling the beginning of the end for the long-established MATZ system.
See the proposal on the Airspace Change website
Thanks to the BGA for pointing us at this story, you can read their story here
