In 1892 a third Watson sister, Miss Florence, had taken over Heidelberg College, making Miss Chrystabel her deputy and moving the school to Castlebar Road, occupying two houses. Miss Flo, as she was known by the girls, lasted as headmistress for an outstanding forty-eight years and was replaced by joint Headmistresses, Miss Emerton and Mrs Turner in 1940.

In 1956 after sixteen years, the two Heads retired and in their place Miss Frances Smith took over the school. She remained Head for fourteen years until Miss Joan Nicholson, who had been with Harvington since 1952, became Headmistress in 1970, until 1988.

Mrs Anita Fookes became Deputy Head in 1986 and in 1988 made the transition to Headmistress. Mrs Fookes joined the staff in 1979 as a part time teacher in Speech training and managed to juggle both her job and position as Mayor in 1980. After Mrs Fookes came Dr Faye Meek in 1998 who was Headmistress until 2006 when Mrs Anna Evans took the position to the present day.

The School’s award system has historical connections and currently runs throughout the four houses: Gordon, after Gordon Road where Heidelberg College Kindergarten School was first opened. Duncan, in memory of Nellie Duncan, a pupil who died from typhoid not long after she left school to join her father in Iquique. An English scholarship was started for girls in her name but lapsed during Word War Two. Kennedy, in memory of Marjorie Kennedy, a Head Girl at Harvington who achieved her Cambridge Higher Local Certificate in 1911. Finally, Norris named after Phyllis Norris, a pupil at the school who died aged sixteen of tuberculosis in 1912. Her parents donated a scholarship for girls with excellent all-round capabilities.