 During World War II the school continued operating despite air raids and bombings.By the 1980s, the school had developed a relationship with St Olave's and St Peter's, with many boys from Clifton continuing their education at both schools; St Olave's and St Peter's did not become coeducational until 1987 and the 1970s respectively.St Peter's purchased Clifton in 1994 and retained it as the pre-preparatory section.