The main hospital is situated in the North West Corner of the site. It consists of wards 3, 4 and 5, along with a fire training school at the west corner and a physio section section in the ground floor east wing (ward 6). Them are two main floors in the main building with a third in the centre which houses the lift motor and a few other rooms. Large conservatories occupy the south facing wings which would have been used for day visits or as a waiting area. This building was the main building used in the filming of The Jacket, and can be identified quite easily when watching the film. At the rear them are grates which seem to lead to a basement but these remain un-investigated.

Description – Grade A listed building comprising two storey wing blocks with a three storey central block. Red sand-stone masonry walling with yellow sandstone ashlar dressings. Pitched roofs and slate covering.

Footprint – GF: 1,478.59m’ / I stF: 857.47m’ / 2ndF: 143.65m’

Listed Status – Category A – HB 6588 HOSPITAL BLOCK (includes wards/villas 3-6) also with large symmetrical front, mostly 2 storeys, day rooms etc in centre part, 3-storey centre piece with bartizans and pyramidal roof; L-plan arrangement at ends with wards in paired wings- 2-storey wards project forwards from ends, single storey wards extend from either end a right angles.