There are 7 SHO posts in Mid-Sussex. The base is a 350 bedded district general hospital. Acute inpatient psychiatry, intensive psychiatric care unit, acute old age assessment, old age day hospital, medium stay rehabilitation unit and inpatient child and adolescent services are all based on site. Also on site is the regional neurosciences unit (neurology and neurosurgery).

In the adult psychiatry service there are 3 sectors each with its own CMHC and a Consultant led CMHT.