Behind the College Hall is 'D' block, completed in the 1960s, and the adjoining 'E' block, completed in the 1970s. Both consist largely of standard classrooms, with the exception of Physics laboratories on the top floor of 'D' block and Biology laboratories on the top floor of 'E' block. Since the 1980s, the second floor of 'E' block has also become home to the Computing department. The school's Lecture Theatre is on the ground floor of 'E' block. 'C' block, located to the north of 'E' block, was opened in the 1990s and replaced a row of temporary classrooms from the 1950s. It now houses the Chemistry, Art and Technology departments.