Drivers of diesel cars could soon have to pay a so-called "toxin tax" for doing so.The Sunday Times reported at the weekend that Environment Secretary Andrea Leadsom will unveil the plans later this week in a bid to tackle the growing problem of air pollution in the UK's worst offending cities. The newspaper claimed that some drivers may get charged up to £20 a day - although this figure has been questioned. And Prime Minister Theresa May has hinted there will be schemes to help...
