Question to the Department for Transport:

To ask the Secretary of State for Transport, whether his Department has made an assessment of the potential impact of the proposed Heathrow airport expansion on trends in the level of particulate matter.

The Government has invited proposals for a third runway at Heathrow to be brought forward by the summer. Once proposals have been received, the government will review the Airports National Policy Statement, which provides the basis for decision making on granting development consent for a new runway at Heathrow. The Government has been clear that any airport expansion proposals need to demonstrate that they contribute to economic growth, can be delivered in line with the UK’s legally binding commitments on carbon and meet strict environmental requirements on air quality and noise pollution.

On 27 February the Secretary of State has said she is ‘minded to approve’ the expansion of Gatwick Airport. Gatwick Airport is now asked to respond to the Secretary of State on the matters raised by 24 April 2025. The Secretary of State will make her final decision on or before 27 October. As this is a live planning application and the Secretary of State has a quasi-judicial role in this process we therefore cannot comment on it further.