Heathrow Airport: Construction
Commons · Question 21298 · Tabled 28 Aug 2026 · Department for Transport · Official record
Answered 8 Sep 2026
Question
Asked by Sarah Olney
To ask the Secretary of State for Transport, what assessment she has made of the risk that the cost of Heathrow expansion will exceed current estimates; and what safeguards will be put in place to ensure that any cost overruns are not borne by taxpayers.
Answer
Answered by Keir Mather, 8 Sep 2026
Any proposal for Heathrow expansion will be subject to rigorous scrutiny through the planning, regulatory and approval processes, including assessment of its costs, deliverability and value for money. It will be for the scheme promoter to secure financing...