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;
Northern General Hospital Clock Tower Building contains the finance department, dining facilities, the volunteers’ office, medical secretaries, security, human resources and the hospital's museum. An out of hours GP centre for patients with minor illnesses alleviates pressure on the accident and emergency department. The hospital is served directly by First South Yorkshire and Stagecoach Yorkshire buses mainly. There is also a specific service that travels between the two main trust sites, the H1. Northern General Hospital The Northern General Hospital is a large teaching hospital and Major Trauma Centre in Sheffield, England. Its departments include Accident and Emergency for adults, with children being