The UK government also uses the term "disabled people" (or "people with health conditions or impairments" if it is more appropriate for people receiving disability benefits), but deprecates "an epileptic, diabetic, depressive" in favour of "person with epilepsy, diabetes, depression".
In the context of disability benefits in the UK, the government employs a preferred terminology of "disabled people" (or "people with health conditions or impairments") and specifies "person with epilepsy, diabetes, depression" over more general phrases like "an epileptic, diabetic, depressive".