Funding for this research was provided by:
Biotechnology and Biological Sciences Research Council (BB/P023886/1)
Received: 24 April 2020
Accepted: 6 August 2020
First Online: 13 August 2020
Ethics approval and consent to participate
: The University of Liverpool Research Ethics Committee deemed that ethical approval was not required for our study design. Both of our datasets (NDNS and supermarket loyalty cards) collected consent from participants for their data to be used for analysis and research.
: All authors gave consent for publication. No other approvals were required.
: None declared.