Diesel for road vehicles is known as DERV (Fuel for Diesel Engined Road Vehicles) or ULSD (Ultra Low Sulphur Diesel which has a reduced sulphur content) and is white in colour.
Because people don't know that they are different entities. This is complex..... The country of England consists of England and Wales (Wales was never a country in its own right). Great Britain was...
The UK and Britain are slightly different. Britain, or Great Britain, is comprised of England, Scotland and Wales. When Northern Ireland is added, the country then gets its full name of The United...