London Mayor Sadiq Khan has officially submitted his opposition to the proposed third runway at Heathrow Airport as part of an ongoing government consultation process. Khan’s stance centers on the argument that the expansion project is fundamentally outdated in the context of modern climate goals and urban planning.

In his submission, the Mayor emphasized that increasing airport capacity at Heathrow would exacerbate noise pollution and air quality issues for residents living under the flight paths. He further argued that the economic benefits touted by proponents of the expansion are overstated and do not justify the long-term environmental costs. Khan’s position aligns with his broader policy of prioritizing decarbonization and sustainable transport within the capital.

While the government is currently reviewing feedback on the project, the debate remains polarized. Supporters of the expansion, including various business groups and aviation industry leaders, maintain that a third runway is essential for maintaining the United Kingdom's global competitiveness and connectivity. Conversely, environmental groups and local community organizations have largely backed the Mayor’s position, citing the potential for increased carbon emissions and the disruption of local neighborhoods. The consultation process serves as a critical step in determining whether the project will proceed, though the Mayor’s vocal opposition highlights the ongoing political friction between local government priorities and national infrastructure ambitions.