Mayor challenges Heathrow expansion

Heathrow northwest runway proposal 2025

Published On: 30th August 2026

In a letter to the House of Commons Transport Committee the Mayor of London, Sir Sadiq Khan, claims the government’s case for increasing Heathrow Airport’s capacity relies heavily on outdated evidence from 2015.

The Mayor and TfL have accused the government of relying on the 2015 report from the Airports Commission, which recommended a new runway be built, and have pointed out that the revised environmental tests do not provide sufficient reassurance that an expanded Heathrow can be delivered without serious environmental impacts. 

Also see our response to the consultation.

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