Although LPG is widely used in homes and businesses, less than one per cent of cars on UK roads use the fuel.
There are a number of reasons why many people are reluctant to convert their car to run on LPG, but one of the main reasons is the lack of incentives from the UK Government.
Although cars converted by approved companies are eligible for Vehicle Excise Duty (VED) savings by being classed as "alternative fuel" cars, the latest rules mean that these only save £10 a year in road tax.
Because LPG converted cars represent such a small proportion of all vehicles on UK roads, there is little incentive for filling stations to offer LPG. And if it is difficult to find refuelling stations that offer LPG, motorists will be reluctant to switch to LPG.
Many people do not understand the advantages and disadvantages of using an LPG car and many motorists are simply unaware of its existence.
In the UK there are currently 368 filling stations offering LPG for sale to the public, a widespread network but a little short of the country's needs.