Guardian: Diesel vehicles have taken a record share of the market on London roads in recent years, despite warnings blaming them for contributing to the capitals illegal levels of air pollution.
Sadiq Khan, the new mayor of London, has been lobbying for a diesel scrappage scheme, a policy that was backed by his predecessor, Boris Johnson, as a way of tackling the illegal high nitrogen dioxide (NO2) levels caused by diesels.
Experts have been speaking out since 2012 about the link between diesel vehicles...