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;
General Hospital (UK TV series) productions to fill in the extended schedules. Among the first of these shows, which were aimed at giving advertisers access to housewives, were the long-running rural soap "Emmerdale Farm" (YTV) and the twice-weekly medical drama "General Hospital". Set in a fictional Midlands town, the series followed the romantic and professional lives of its doctors and nurses. While the location and the characters names had been changed, in most other respects "General Hospital" was almost identical to its predecessor, "Emergency – Ward 10", a deliberate attempt to recreate its success. In 1975, after 270 twice-weekly episodes, "General Hospital" was given a