The newly formed West Sussex County Council took over the provision of public services not provided by the local boroughs and boards of guardians, including the care of the insane.

[2] Lodges and other outbuildings differed in their use of rendered upper storeys and the chapel was built in local flint and reconstituted stone with a red clay tiled roof.

[4] As was standard practice at the time, the asylum employed strict segregation of the sexes, with females confined to the east side of the site and males to the west.

[6] As a relief from the demanding manual labour required of physically able inmates, patients were allowed a wide range of social and leisure activities including sports, dances and fetes.

The Main Hall provided a focus for these activities, having a proscenium stage, orchestra pit and two Gaumont-Kazee cinema projectors with Rank audio visual rectifiers.

During the 1950s and 60s the hospital saw the extension of day rooms in acute wards, the addition of an occupational therapy department next to the chapel and a new block to the south west of the site.

"[16] Graylingwell Hospital celebrated its centenary in 1997 with the publication of various books and pamphlets and an exhibition in the Chichester District Museum featuring original plans and drawings.

By this time, patient numbers had declined significantly, with National Health Service policy having moved away from long stays in psychiatric wards to care in the community.

[23]Extensive historical information is also available in the books by Barone Hopper, who was a specialist Psychiatric Social Worker, both at Graylingwell Hospital and in the West Sussex community.