Transport is the UK’s largest source of carbon emissions, with road transport being a substantial contributor. The government is trying to increase the number of ultra-low emission and zero-emission cars on the road as a way of reducing carbon emissions. Up to March 2020, it had spent £1.1 billion on a range of consumer grant schemes and an awareness campaign to encourage people to make the switch. This aim is not new; previous governments have been promoting ultra-low emission cars since 2011, with the Departments for Transport and for Business, Energy & Industrial Strategy creating a team called the Office for Zero Emission Vehicles to support the transition. In November 2020, government announced its ambition to stop the sale of new cars that are powered solely by petrol or diesel by 2030. From 2035, only new zero-emission cars can be sold.