Vehicles registered outside the UK must stick to the same regulations or pay a daily fee to drive in the Ultra Low Emission Zone. For TfL to verify that you are exempt from paying the fee, you must show them evidence that your car satisfies emissions regulations. You can register a car with TfL, but you will have to pay the daily fee until you get confirmation that your evidence of emissions status has been accepted. During this period, you will be eligible to receive a refund for any previously paid payments. A non-UK vehicle may take up to 10 working days to register with TfL.