Written Question·Department for Transport·UIN 95689
Motor 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 assessment her Department has made of the contribution of illegally high vehicle emissions arising from the use of defeat devices to overall UK nitrogen oxide and greenhouse gas emissions levels.
Answer
Simon LightwoodDefeat devices are illegal, misleading for drivers and can have negative health impacts on the public. The Department for Transport has not conducted a specific assessment of the contribution of illegally high vehicle emissions arising from the use of def...
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