In summer 1914 the school's summer camp at Barry had to be abandoned when both the commanding officer and the adjutant were called up for service in the First World War. Of the 2,000 former pupils who had by then been educated at the school, 1,094 served in the armed forces, and 246 died during their war service. In 1921 a war memorial designed by Birnie Rhind, bearing the inscription "carry on", was unveiled by Major-General Sir William Macpherson in the school grounds. A central heating system was first introduced in the main building in 1920, and electric light was first introduced in the school in 1924.