on the programme. The series employs a team of researchers to ensure medical accuracy, and utilises surgeons from different disciplines to check scripts. Cast members are taught to perform basic medical procedures, and given the opportunity to spend time on real hospital wards for research. Holby City has, however, been criticised for its lack of realism, with the British Medical Association denouncing its portrayal of organ donation and unrealistic impression of resuscitation, and an accident and emergency nurse at the 2008 Royal College of Nursing conference accusing the show of fostering unrealistic expectations of the NHS and fuelling compensation culture. Holby City has been nominated for over 100 television awards, of which it has won ten: the 2008 British Academy Television Award for Best Continuing Drama, one BEFFTA Award, two Ethnic Multicultural Media Awards, two Music Video and Screen Awards, and four Screen Nation Awards. The show's first series averaged 9.27 million viewers, but apart from a rise in its fifth series, ratings declined year-on-year until 2009, with the eleventh series averaging 5.44 million viewers. The twelfth series saw a small rise to 5.62 million. Later series consistently drew over 4 million viewers per week. Production The show began with only eleven main characters in its first series, all of whom have since left the show. New main characters have been both written in and out of the series since, with a core of fifteen to twenty main actors employed on the serial at any given time. In casting the first series, Young sought out actors who were already well known in the television industry, something which has continued throughout the show's history, with cast members including Patsy Kensit, Jane Asher, Robert Powell, Adrian Edmondson, Alex Walkinshaw and Jemma Redgrave. McHale was the show's lead writer for several years, and was the first British writer ever to become the "showrunner" of a major prime time drama. Under his tenure as executive producer, attempts were made at modernising the programme and appealing to a younger audience by taking on the filmising technique and introducing musical montage segments into each episode. Twenty complete series of Holby City have aired, and an twenty-first began airing in January 2019. The show has run for over 600 hour-long episodes. It is filmed in studios at the BBC Elstree Centre in Hertfordshire, with the 1960s office building Neptune House being used for multiple exteriors and interiors