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;
St Peter's Hospital, Chertsey included the accident & emergency department, the ITU and the orthopaedic unit was opened by Prince Edward in the summer of 1998. The Duchess of Kent Wing was extended to include two further wards in 2006. The hospital radio station, Radio Wey started broadcasting to patients and staff from St. Peters in 1965 and today also serves an area beyond the hospital's main catchment area. St Peter's Hospital is SSW of Chertsey railway station and has regular bus services to a wide range of towns. A free shuttle service is also available for patients, staff and visitors between Ashford Hospital