Inclusion Criteria:  Participant is willing and able to give informed consent for participation in the study. Male or Female, aged 40 years or above. Diagnosed with current type 2 diabetes (i.e. not in remission) in the last 6 years BMI of ≥27kg/m2 (≥30kg/m2 if ethnicity recorded as white) Has a smartphone or computer with internet access (and the correct operating system requirements to use the intervention programme) Are able to complete the eligibility and baseline assessments online Would like to make changes to their diet or lifestyle to improve their diabetes control, lose weight, or improve their general health  Exclusion Criteria:  Unable to understand the study materials and interventions Currently following a weight loss programme (defined as a structured, prescribed and monitored programme and not a self-directed weight loss attempt) Pregnant, breastfeeding, or planning to become pregnant during the course of the study History of bariatric surgery, including gastric banding Currently using insulin therapy Proliferative diabetic retinopathy, or maculopathy. Recent myocardial infarction or stroke (<3 months) Renal failure (chronic kidney disease stage 4 or 5) Current active treatment for cancer (other than skin cancer treated with curative intent by local treatment only) Their doctor does not feel they are appropriate to participate for another reason (e.g. active eating disorder diagnosis, significant psychological disturbance)