1 Introduction People with higher weight (body mass index [BMI] ≥ 30 kg/m2) experience many challenges that undermine their mental and physical health, engagement in positive health behaviours, and capacity to achieve and sustain weight loss. (The term ‘people with higher weight’ is used throughout this article and the conduct of this research, as terms like ‘people with obesity’ or ‘people with overweight’ are often experienced as stigmatising by those with a BMI ≥ 30 kg/m2.