Yes. My hon. Friend makes a very good point. The idea behind the scrappage scheme is that it will not only help with air quality but provide some recompense for people, in that those who were moved towards diesel will get a carrot as well as a stick. A stick, in the form of a £12.50 charge, will be applied here in London in 2019. I do not necessarily disagree with it, but a poorer family, who may not be able to afford another car, do need some help. A scheme such as the one under discussion is part of the balance that must be struck. As I said, people were encouraged down the route of diesel. We also have to get over a certain amount of scepticism among the public. They will be saying, “For years you were saying, ‘Drive diesels.’ Now you say, ‘Don’t drive diesels; drive hybrids and electric cars.’” That is absolutely right, but we have to explain exactly why we are going down that route, and a scrappage scheme would help to ease the pain.