Table 1 Inclusion and exclusion criteria

Type 1 diabetes (T1D) ≥3 months post diagnosis

Co-existing pathology, e.g. cystic fibrosis

Aged 12–18 years inclusive

In receipt of prescribed medication likely to affect glycaemic control, e.g. systemic steroids

Able to give assent <16 years of age and informed consent >16 years

Have a diagnosed psychological or psychiatric disorder(s) that requires specialist treatment

Have parental/guardian consent for young people <16 years

Able to complete ADNAT

Have Internet access at home, school, hospital, public library or via mobile technology