Supporting weight management during COVID-19

INTERVENTION: Participants will be randomised to either the SWiM intervention or to a standard advice wait list control using a computer‐generated sequence with 1:1 allocation stratified by sex and BMI classification. If they have been allocated to the SWiM intervention, they will receive access to an online web platform with 12 modules (SWiM sessions) consisting of psychoeducational content, reflective exercises, and behavioural experiments. SWiM is intended to be a 12 week intervention, with 1 session completed per week. It also includes a weight tracker and remote support from a SWiM Coach via telephone after completing the week 4 session and via email after completing week 10 session. If allocated to standard advice waitlist control, they will be emailed a PDF of the European Association for the Study of Obesity (EASO) guidance on diet, physical activity and mood during the COVID 19 pandemic. At the end of the study participants who received standard advice will receive access to the SWiM website, and those who received SWiM will receive standard advice materials. Participants will complete outcome assessments online at baseline and the end of the 12 week programme. CONDITION: Overweight and Obesity ; Nutritional, Metabolic, Endocrine ; Obesity PRIMARY OUTCOME: Self‐reported weight (kg) at baseline and 4 months SECONDARY OUTCOME: ; At baseline and 4 months::; 1. General health measured using the Patient Health Questionnaire 8‐item (PHQ‐8); 2. Anxiety measured using the Generalized Anxiety Disorder 7‐item (GAD‐7) scale; 3. Stress measured using the Perceived Stress Scale (PSS‐4); 4. Weight‐related thoughts and feelings measured using the Acceptance and Action Questionnaire Weight‐Related (Revised) (AAQW‐R); 5. Eating behaviour measured using the Three‐Factor Eating Questionnaire (TFEQ‐R21); 6. Physical activity measured using the International Physical Activity Questionnaire (IPAQ ); 7. Health related quality of life measured using EQ‐5D‐L; 8. Wellbeing measured using ICECAP‐A; 9. Website Usage (data analytics); 10. Demographics and intervention engagement; INCLUSION CRITERIA: 1. Adults (Age = 18 years) 2. Overweight or obesity (BMI = 25kg/m²) 3. Good understanding of written English (materials are not suitable for non‐English language speakers) 4. Willing to be randomised to either intervention and to complete outcome assessments online 5. Own a set of scales that they can weigh themselves with during the study