After the war, the hall was repaired, and several years later was the organ was replaced. Around 1950 the school was given Grammar School status with the traditional grammar school ethos and curriculum. In 1958, a four-storey concrete building was added at the rear of the old buildings. This building accommodated extra classrooms (following the post-war baby-boom) with the art rooms on the top floor. In the late-1950s to mid-'60s, the school was highly rated and competition for places was strong.