Sadiq Khan and Transport for London misled Londoners with some claims about the benefits of the Ulez, the advertising watchdog ruled on Wednesday.It said the Greater London Authority or TfL breached its rules on three occasions, including with the suggestion that “one of the most polluted places in London is inside your car”.TfL was also wrong to have said that “most air pollution related deaths actually occur in Outer London areas” and that the Ulez had resulted in “almost a halving of levels of nitrogen dioxide” in central London.