In the early 1960s the school was required to sell 18 acres of land to allow Telford College to be built and to sell 14 acres for a new headquarters for Lothian and Borders Police. Following a public inquiry in 1965 the school was also forced to sell 15 acres of land to allow Broughton High School to be re-built. A new dining hall was opened in 1966 and a new school library was opened in 1970. The Queen Mother also opened a new science school in 1970.