Hello, I have a question about London’s ULEZ (ultra low emission zone) that’s expanding in October. I understand that for petrol engines cars, anything that’s Euro 4 or better is exempt. However, my Y reg 2001 Audi A4 B6, which is Euro 3, appears to be exempt based on the TfL checker. Just curious if this is a mistake or if there is dispensation for some older cars? I emailed TfL directly and their response didn’t answer my question.