That there was a 'blue room' for this sort of reason is a little disturbing in itself. It suggests this was a planned and acceptable form of response. There are alternatives to this sort of behaviour - admittedly more labour intensive, and hence more expensive - as his current position suggests, that work.
Two aspects that I find more worrying are that the school in question was run by Scope - a charity committed to learning disabled people that I have considerable respect for, and that the remedy had to be sought via the courts - and CQC seems to have had little to say about this. I assume it didn't fit their tick boxes as it was an educational establishment. People are still people whatever care context they are in.
Those involved need to be held to account for this and I will do what I can locally to ensure this is treated as unacceptable by the responsible parties. It may have been Wigan paying for this and it may have been Scope running the school, but it happened in Lancashire and for that I'm ashamed.