"Pink" diesel is sold for agricultural use at a reduced rate of duty (it stains the tank pink so that the Revenue can check if it's being used for non-agricultural use - i.e. in farmer's cars!)

Slightly ironic that so many tractors were involved in the fuel protests a few years ago - but of course that was a completely apolitical pressure group

Pete

God is our guide! from field, from wave, From plough, from anvil, and from loom; We come, our country's rights to save, And speak a tyrant faction's doom: We raise the watch-word liberty; We will, we will,we will be free!