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;
Characters of Holby City the hospital. When Tash's father visits the hospital, she discovers he has Alzheimer's disease. She tells him she is a lesbian, and he refuses to accept her identity. When Tash's ex-girlfriend arrives, terminally ill from complications arising from AIDS, Tash decides to join her on a world tour, and departs from Holby. Ayesha Antoine plays Rachel Baptiste, who appears from series eleven, episode six as a staff nurse on the general surgery ward, Keller. Antoine had formerly appeared in "Holby City" series seven, episode five, as Mel Allen, the relative of a patient. She described her character upon her introduction