SLG Economics review of research into HFSS advertising restrictions on TfL

ISBA and the Advertising Association have published a review of research into HFSS advertising restrictions on TfL. The report assesses a research study by the London School of Hygiene and Tropical Medicine on the effectiveness of the ban on HFSS advertising on the Transport for London (TfL) estate in 2019. The review was carried out by SLG Economics. 

This report examines:

  • The counterfactual used in the TfL study,
  • The coverage of HFSS categories in the TfL study,
  • The credibility of the results of the TfL study in the light of:
    • Comparing the results with other advertising bans,
    • Excluding out-of-home consumption from the research,
    • Conflicting evidence of impacts on childhood obesity, and
    • Other factors including:
      • The voluntary restrictions on HFSS advertising near school boundaries
      • The availability of HFSS advertising in free newspapers which are widely read by TfL users
      • The failure of the TfL study to track usage of TfL services by people in the survey
  • The statistical validity of the results

If you have any questions or would like to discuss this further please contact ISBA's Director of Public Affairs, Rob Newman, at RobN@isba.org.uk.

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SLG Economics review of research into HFSS advertising restrictions on TfL