[Mgs] Run the MG on methane

[Richard Gosling]

No problem with tax - the LPG is taxed as a road fuel, and sold at normal
filling stations, it's just taxed a lot less because the government wants to
encourage its use as a supposedly "greener" alternative fuel.  It's all
legit!

We have the same thing with agricultural fuel - "red diesel" with a dye in
it is sold for off-road use only.  With the much higher road fuel taxes we
pay over here there is a huge temptation to use it for the road, but, like
you, the penalties for doing so are severe.

Richard