Question to the Department for Transport:
To ask the Secretary of State for Transport, what proportion of buses running public routes in the UK are using (a) diesel and (b) petrol engines.
Data on the fuel type used by buses running public routes in the UK is not available. However, at the end of 2019, for all licensed buses & coaches (including minibuses) in the UK, (a) 97% used diesel engines and (b) 2% used petrol engines.