The chief executive of the learning disabilities charity Mencap, Mark Goldring, said cases like Simone's highlight a system that has resorted to warehousing difficult patients with challenging behaviour.
The proposed development is for 160 new houses and flats between Goldring Close and Hawthorne Grove on the island, as well as two other larger greenfield estates in South Hayling.
Mark Goldring, chief executive at the charity Mencap, would be helping officials at the Department of Health investigate the findings of inquiries by the Care Quality Commission (CQC), England's regulator of health and social care services, and the local council, Mr Burstow added.