That's one way to beat the fuel increases: Volkswagen unveils sleek new car that does an incredible 313 miles to the gallon

Volkswagen has unveiled the world's most economical car that it says can travel 313 miles on a gallon of diesel.

Emitting just 38 grammes of carbon dioxide per mile travelled, the XL1 Super Efficient Vehicle is also likely to be the vehicle of choice for green enthusiasts.