East London NHS Foundation Trust has launched an immediate internal investigation into the circumstances surrounding the escape of a patient from the John Howard Centre.
We have reviewed our security and processes as a matter of urgency.
The Trust is working with the police to assist them with their investigation.
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The 23-year-old, who won best song at the Mobo awards last year, was sentenced to eight months.
The tenants were forced into 'sleeping shifts' as night workers would swap with those who had daytime hours at the Wembley property.
The incident comes just days after four fans were suspended for abusing Manchester City's Raheem Sterling.