A serious case review has revealed systemic failures at Medway Secure Training Centre in Rochester.
In 2016, the centre was the subject of a television investigation in which an undercover reporter showed abuse at the G4S-run facility.
It included excessive use of force when restraining children, bullying and aggressive behaviour.
G4S has said the behaviour of some staff was unacceptable and in stark contrast to their training and values.
Watch Abigail Bracken's report below:
- Contains footage from BBC Panorama