Holby fictional hospital within the city in which "Casualty" and "Holby City" are set. It is based on the Bristol Royal Infirmary which the original script writers spent time observing in the 1980s in order to garner ideas for "Casualty". Although both shows are set in the same hospital, "Casualty" is primarily filmed in Cardiff, whilst "Holby City" is filmed in Hertfordshire at BBC Elstree Centre. The indoor shots for the first series of "Casualty" were filmed at BBC Television Centre in London. The exterior shots of the hospital used in "Casualty" were formerly filmed at the City of Bristol College;
Prince of Wales Hospital has treated 139,975 patients in the Accident and Emergency Department, 158,195 inpatients and day-patients, 766,386 specialist outpatients, and 466,390 general outpatients. Besides subsidised public services, the hospital has been providing private specialist outpatient services and private inpatient services since its opening in 1984 in collaboration with the Faculty of Medicine of CUHK. Charged at market rates, the private services are intended for patients who want to have access to the expertise and facilities of the hospital, which may not be available at private hospitals. Private service income is shared between the Hospital Authority, CUHK, and the departments and the doctors