What is fuel duty?
Fuel duty is a tax which is paid on most fuels – since March 2011, it has stood at 57.95p per litre of petrol, diesel, biodiesel and bioethanol.
VAT, which is currently 20%, is also added to the total price of the fuel.
Data from the RAC foundation says that 59.6% of the pump price of diesel and 61.2% of the pump price of unleaded petrol is made up of tax.
And according to the Office for Budget Responsibility, fuel duty will bring in £28.2 billion for the Treasury in 2018-9, equivalent to £1,000 per household.