 Although screening is offered in multiple locations including GP general practice surgeries and hospitals, the poor uptake of screening in socially deprived areas is well documented. For example, in Gloucestershire, with each increasing quintile of deprivation, diabetes prevalence increases odds ratio 0.84, the probability of having been screened for diabetic retinopathy decreases odds ratio 1.11, and the prevalence of sight-threatening diabetic retinopathy among screened patients increases also odds ratio of 0.98. 