The ASA ruled that London's Ultra Low Emission Zone (Ulez) ads made by TfL contained misleading pollution claims not based on pre- and post-implementation air quality measurements.

The Advertising Standards Authority (ASA) has ruled that ads promoting the expansion of London's Ultra Low Emission Zone (Ulez) made misleading claims about pollution levels. The watchdog found that claims made by Transport for London (TfL) were not based on measurements of air quality taken before and after the scheme's implementation. TfL based its claim on calculating the difference between current air quality measurements and a 'non-Ulez scenario', without qualifying this for listeners and likely misleading them. The ASA has told both TfL and the Greater London Authority to ensure claims relate more closely to relevant evidence in the future.

February 07, 2024
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