The most recent full integrated Independent Schools Inspectorate (ISI) inspection awarded the grade "excellent" in all 9 categories.

[3] The existence of dedicated school rooms was recorded during a Marian visitation of the University in 1557 which inspected the "chorusters chamber and schole" and took away a number of books deemed to be unsuitable.

[5][4][3] In the 1820s during the rebuilding by William Wilkins, the brick building and adjoining Provost's Lodge were demolished, opening up a view of the chapel from the street.

[3] In 1828 the Wilkins building on the south side of the court opposite the chapel was opened and the school was housed in rooms within it.

This was opened on the current site in West Road in 1878, and by 1880 all 16 choristers were boarders, and there were also 8 non-chorister day pupils, a number that would gradually increase over the coming decades.