Dr Custard trained at the University of Birmingham Medical School (qualified 2001 MBChB). His junior medical training was carried out in the West Midlands and on the south coast. He then completed his higher specialist training in the Severn region (Somerset, Avon and Gloucestershire) gaining experience in all the major medical specialties (Respiratory, Cardiology, Endocrinology, Gastroenterology, Geriatrics and Intensive Care Medicine) and in many different Acute Medical Units.