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Written Question
Buses: Exhaust Emissions
Monday 22nd December 2025

Asked by: Sam Carling (Labour - North West Cambridgeshire)

Question to the Department for Transport:

To ask the Secretary of State for Transport, what steps she is taking to reduce the level of exposure to children of diesel emissions from buses operating near schools.

Answered by Simon Lightwood - Parliamentary Under-Secretary (Department for Transport)

The Government shares the concern about the impact diesel bus emissions have on air quality, and ultimately to children's health.

The NO2 programme has provided £576m to support local authorities (LAs) to improve air quality in areas of nitrogen oxide exceedances. This funding is for LAs to scope and develop measures; implement, monitor and evaluate their measures; and provide mitigation funding for local people and businesses affected by their measures. Clean Air Zones have also been implemented in places where the local evidence shows they are the quickest route to reduce nitrogen dioxide pollution.

The most effective way to reduce bus emissions and improve air quality is to achieve an all zero emission bus (ZEB) fleet. As of March 2025, 12.4% of the bus fleet across England was zero emission, however we need to make further progress in accelerating bus decarbonisation.

We legislated in the Bus Services Act 2025 to ultimately prevent bus operators from using new non-ZEBs on local bus routes in England. This measure will provide confidence to the sector and stimulate the investment needed to deliver a fully zero emission fleet alongside the improved air quality benefits.

Separately, in April we announced £38m to deliver an additional 319 ZEBs through the Zero Emission Bus Regional Areas programme. Furthermore, the recent announcement of £15.6 billion over five years, to improve local transport in some of our largest city regions, allows local leaders to play a more active role in the delivery of local bus services and allocate some funding toward decarbonising their local fleets. Our smaller cities, towns and rural areas will also receive £2.3 billion from the Local Transport Grant.