In 1944, Conservative politician Rab Butler put forward the Education Act 1944, suggesting a large-scale reform of British schools by introducing a "tripartite system" that divided students based on their academic ability and allocating them to one of three schools: the grammar school, secondary technical school and secondary modern school. Deciding how to implement these reforms on a local scale, in 1946, E. V. Mills chaired a meeting of the Divisional Executive in which they suggested radically changing the schooling system in the area. They decided that Chislehurst and Sidcup County School would become a grammar, and would be moved from its site at Critall's Corner to a much larger space at Lamorbey in Sidcup, where it would be situated alongside a newly built technical school, Hurstmere School. Meanwhile, the site at Critall's Corner would be converted into a secondary modern, which would later be known as Kemnal Technology College. This was partly to alleviate problems of overcrowding; the population of the local area had tripled since 1931, and the Critall's Corner building was taking in more than the number of students that it had been built to accommodate.