See this:http://www.cqc.org.uk/media/cqc-report-winterbourne-view-confirms-its-owners-failed-p rotect-people-abuse
You need to pick out examples of unsafe practice such as:
'systemic failure to protect people or to investigate allegations of abuse'
'Failed in its legal duty to notify the Care Quality Commission of serious incidents including injuries to patients or occasions when they had gone missing'
' staff did not appear to understand the needs of the people in their care'
'People who had no background in care services had been recruited, references were not always checked and staff were not trained or supervised properly. Some staff were too ready to use methods of restraint without considering alternatives.'
and there's a whole list bullet pointed further down.
Hope that helps