The UK Civil Aviation Authority has taken another step in the long-running Heathrow expansion debate by launching a consultation on several possible regulatory models that could shape how future capacity projects at the airport are managed and financed.
The move follows a working paper released in November 2025, where the regulator explored whether Heathrow’s current regulatory structure still remains the best option for passengers and airlines as the airport prepares for future expansion plans.
At the time, the CAA reviewed a wide range of possible alternatives, drawing on proposals submitted by Heathrow Airport Limited, Arora and Heathrow Reimagined, as well as regulatory systems already used in other sectors and international markets.
The latest consultation now narrows those ideas down to a smaller shortlist that the regulator believes deserves deeper examination in the next phase of the process.
Among the options being considered is an enhanced version of Heathrow’s existing framework. This would involve strengthening oversight around capital expenditure, tightening governance rules and increasing scrutiny of procurement processes linked to expansion works.
Another proposal focuses on a longer-term price control structure designed to give Heathrow greater flexibility when securing financing for major infrastructure projects over extended periods.
The CAA is also examining competitive delivery models, which could require Heathrow Airport Limited to open parts of the expansion programme to competitive tendering while still retaining overall coordination and financing responsibilities.
Perhaps the most significant proposal is the alternative developer model. Under this structure, a separate developer could potentially design, finance, build, own and operate certain airport assets such as a new terminal while competing directly with Heathrow Airport Limited for airline business and revenue streams.
However, the regulator noted that such a model would likely depend on planning approval being granted through the Development Consent Order process.
The consultation period will remain open until 15 June 2026. Following feedback from stakeholders, the CAA plans to publish a high-level update in July before releasing a more detailed document in the autumn outlining the next stages of work.
The timing is important, as the UK Government is also expected to launch its own consultation on revisions to the Airports National Policy Statement by July 2026, potentially setting the tone for the next chapter of Heathrow’s expansion strategy.
