I believe, everyone should watch this documentary, which aired on 18th April 2019, regarding The Priory Group:

The Priory: Teenage Mental Health Uncovered

You can see CCTV is used and operational in the Priory placement, yet to my knowledge, none of the incidents and likely others was reported.
In my opinion, this can only strengthen the case for CCTV in places where vulnerable adults live, and for it to be controlled and monitored independently.

For the interest of the public, I have a particular letter from DW (Director of Risk and Safety at The Priory Group) defending staff who accidentally filmed themselves, and later deleted the recording.
In the deleted and recovered recording, Priory Group staff admit to ‘more’ evidence being given to local authority social workers, yet I discovered it was wilfully ignored by them and concealed.

I hope to publish the letter in the coming weeks, along with the video recording of staff in the interest of the public, particularly those who have loved ones in Priory Group ‘care’.