CCHS is traditionally rated among the most consistently high achieving and academically successful secondary schools in the United Kingdom, regularly scoring top marks for both GCSE and A-level results.

A new school science building, known as Bancroft Wing, was named in her honour when it was finished in 1950.

In 1997, Bernice McCabe left to take up the post of Headmistress in the North London Collegiate School for Girls.

The school remained open throughout World War I, with forms being assigned "shelter" in a place away from windows or an outer wall.

In June 1916 Winifred Picking became the School's first University success when she gained a First Class degree in the Natural Science Tripos at Girton College, Cambridge.

Maintaining examination conditions during air raids was also a problem: eventually exam candidates were given their own separate shelter.

Extensive building work was initiated in the 1950s and continued throughout the 1960s – in that time, the current caretaker's house, swimming pool, hall, canteen, art rooms, and library were built.

Margaret Thatcher, along with the local MP Simon Burns, paid a brief visit to the school on 30 March 1992.

Building work continued with the development of the new school Astroturf pitch in 2004, the extension of the sixth form common room in 2005, and new music centre in 2007, which has been built in the shape of an orchestra, including a fully equipped recording studio.