A Bi-Fuel vehicle has multiple fuel tanks and are able to run on two fuels. One uses petrol or diesel and the other uses an alternative fuel like hydrogen, liquid petroleum gas (LPG) or natural gas.
When driving you can simply choose which fuel you wish to use at the flip of a switch and when one runs out it will automatically switch to the other.
These save you money, reduce emissions and increase range, when comparing to a normal petrol or diesel engine, what's not to love?
You can fill these up similar to fuelling a petrol or diesel car at any LPG station that are placed all over the UK.