It was run as a preparatory school for the Royal Indian Engineering College at Cooper's Hill, later Brunel University.
Croslegh was responsible for building the Big Room and commissioned Henry Woodyer to design the chapel in 1886.
[5][6] In 1896, Croslegh sold the lease to Philip Morton and Ronald Vickers, who established a preparatory school.
In 1903, Vickers became the sole owner and oversaw the extension of many buildings and the construction of the sanatorium and squash courts.
[5] The school was used as a location for A very open prison, an episode of the BBC series Screen Two, broadcast in March 1995.