Written Question·Department for Transport·UIN 95691
Diesel Vehicles: Exhaust Emissions
Tabled: 1 December 2025
Answered: 9 December 2025
Question
Helen Hayes
Labour — Dulwich and West Norwood
To ask the Secretary of State for Transport, what steps her Department is taking to ensure that emissions from non-compliant diesel vehicles are fully accounted for in the modelling and monitoring underpinning the UK’s Net Zero Strategy.
Answer
Simon LightwoodEmissions projections for diesel vehicles used in the recently published Carbon Budget and Growth Delivery Plan account for the difference between reported vehicle CO2 emissions, tested using the World Light Duty Test Procedure, and emissions from vehicle...
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