The facility was renamed St Conal's Hospital in 1956. As the hospital expanded nursing staff numbers reached close to 500 in the 1960s. After the introduction of deinstitutionalisation in the late 1980s the hospital went into a period of decline. However patients were still required to carry out activities on the hospital's working farm which only closed in 1995. Electroconvulsive therapy (ECT) was still being carried out on patients in the hospital in the late 1990s. The hospital had people work on its farm until 1995.