 Uro-neurological disorders are those in which there is a disturbance of bladder function related to a neurological cause. However, many patients with Uro-Neurological disorders are not found to have explanatory abnormalities despite adequate clinical and radiological investigation, so-called scan negative patients. The BLB study will investigate this problem through an acute disorder, Cauda Equina Syndrome CES, to provide a better understanding of scan-negative Uro-Neurological disorders. 