Inclusion Criteria:  Patients within the Liverpool Overweight and Obesity Programme aged 12-18 years BMI>30 Receiving input from members of LOOP clinic at Alder Hey for weight management For those prescribed Metformin: Stable dose for 3-months or more  Exclusion Criteria:  Severe learning/behaviour difficulties Severe autism Secondary causes of obesity like Cushing's disease Syndromic causes of obesity Patients on GLP-1 analogues for obesity Type 2 diabetes mellitus Require an interpreter