Question to the Department for Transport:

To ask the Secretary of State for Transport, what assessment he has made of the impact on CO2 emissions of the change from E5 unleaded petrol to E10.

E10 petrol (petrol containing up to 10% bioethanol) was introduced as the standard petrol across Great Britain in September. The impact assessment published alongside the Motor Fuel (Composition and Content) and the Biofuel (Labelling) (Amendment) (No. 2) Regulations 2021, which introduced E10, estimates that the change from E5 unleaded petrol to E10 is expected to reduce CO₂ emissions by around 0.7 to 0.8 megatonnes per year.