My Lords, as the noble Lord knows perfectly well, if someone poured used cooking oil into a river they would be committing a serious criminal offence.
I can answer the point from my noble friend the Duke of Montrose, who talked about the freezing point—the wax point—of gas oil. There are, as he will know, technical regulations regarding where gas oil or diesel oil will freeze, but I have not briefed myself on that. In Bosnia, however, in the winter of 1993-94, I experienced gas oil freezing and it was not very funny. If I have anything more to add on that or if there is a
problem I will write to my noble friend. I suspect that there is no specific freezing problem. However, I have to be honest and say that there are issues with biodiesel regarding how long you can store it. Advice is being issued to the people responsible—especially those with large generating plant or construction equipment—so that they know the limitations and that they will have to adapt their procedures slightly. It is a well understood problem.
4.15 pm