The action sounds heavy handed in the extreme, and with no comment from the Met. I can only infer that they are too embarrassed to comment and just want this to go away. Things like this shouldn't be allowed to go away. The incident itself is reprehensible but if it's allowed to drift under the public view, it effectively makes this sort of action less of a worry for the police. They'll only stop doing it if they are forcibly told it's wrong.
It sounds to me that the whole incident could have been avoided if the police had dealt with the carers sensibly and not jumped in with both feet. The police should be the ones who protect vulnerable members of the community - not the ones who inflict the damage. This is the extreme tip of a big and expanding iceberg as more people with learning disabilities lose support through service cuts and come up against the law through 'inappropriate behaviour'. If they'd had the right support, I suspect the police wouldn't have been called in at all.
This is a serious matter, I'll be interested to see how long it stays on the BBC news front page.