The school moved to its present site in Sevenoaks, Kent in the 1930s, and the building became the Lawrence Hall Hotel until its purchase by the Cassel Foundation in 1947.

[9] The hospital developed approaches informed by psychoanalytic thinking alongside pharmacological interventions, techniques of group and individual psychotherapy.

[10] It was here that Tom Main, along with Doreen Wedell (the hospital's Matron from 1946 to 1963),[11] pioneered the concept of a therapeutic community in the late 1940s.

[12] Nurses were supported and taught to understand their reparative need, to challenge their sense of omnipotence and to rely on the patient group as the most useful resource.

[16] It is now a psychotherapeutic community which provides day, residential, and outreach services for young people and adults diagnosed with severe and enduring personality disorders.