Originally Posted by anodised

From 2007-10-01 the main road fuel (petrol and diesel) duty rate in the UK is GBP£0.5035 per litre. The rate for biodiesel and bioethanol is £0.3035.[1] Value Added Tax (VAT), currently at 17.5%, is also charged on the price of the fuel and on the duty. At a pump price of 100p/litre (typical for unleaded as at November 2007), this would put the combined tax at 65.24p/litre, or approximately USD$4.84 per gallon. Thus without tax, the retail price would be 34.76p per litre, making a combined tax rate of 188%.

Jet fuel used for international aviation attracts no duty, and no VAT.