In 1997, the global prevalence of diabetes was estimated to be 125 million and this has risen to around 400 million in 2015. In addition diabetes has a number of complications including heart disease, blindness, kidney failure and amputation. This represents a significant burden on healthcare services. Type 2 diabetes (T2D) is caused by a combination of genetic and environmental factors. The aim of GoDARTS is to recruit participants with T2D to a registry to provide a platform with which to investigate the genetics of T2D, its complications and response to treatment. This study will investigate the genetic basis of diabetic neuropathic pain.