Professor Louisa Ells and Ken Clare will discuss the critical role of public and patient involvement (PPI) in our applied obesity research at the School of Health. They discuss how they worked together with a fantastic PPI group to codevelop and run the NIHR funded Re:Mission study. Louisa and Ken provide insights from the researcher and PPI members perspective, and describe how they continue to work together to further develop PPI activity at Leeds Beckett.