The National Autistic Society would probably give you better, more meaningful information than an OSH site.

There is loads of information out there on autistm related sites

OK, fair enough.

Personally, I prefer to be guided by those who specialise in understanding "these children..." and acknowledge that by definition the Specturm part means that no two children are the same.

That's just me though. I still wouldn't take advice on case work from a H & S bod

My son is a specialist teacher in this area and all the organisations he has worked for have a full and proper system in place.
Beyond being a teacher (and previously an assistant) he is fully trained in all aspects.
He now works with younger kids but when he worked with young adults his body rarely free of bite marks and bruises.
I know he is my son, but my admiration for him and his colleagues knows no bounds.

Its highly specialised work and should be left to the experts.