On moving into the purpose-built school, Taylor brought in two masters from St Peter's Broadstairs, Geoffrey Hellard and Oswald Wright, and became matron instead.

In 1914 Rolf Henderson became the headmaster and his portrait painted by his brother, Keith, a Scottish artist, hung in the school dining room.

[3] In 1934 Pat Knox-Shaw, who had joined the school in 1919 as second master, took over the reins as headmaster on Rolf Henderson's retirement.

In 1940, during the Second World War, St Peter's evacuated to The Nare Hotel in Veryan near Falmouth, Cornwall.

Michael Farebrother, another assistant headmaster, took the helm and shortly after was joined by an old boy, Harry Browell who together with Serena his wife, ran St Peters until 1967 when they retired to Australia.

In 2013 a retired teacher at the school, Christopher Jarvis, was convicted of sexually assaulting boys at St Peter's in the 1970s.