Apologies, I wrote this earlier, so it's answering earlier questions, for some reason it saved without posting.
I don't post on the SEN boards because they are very quiet, but also because the approach we take is having a positive effect albeit very slowly, but it isn't everyone's cup of tea (to put it mildly) and we do not, for example, remove demands or triggers as a blanket manner, we do look at them individually but our aim is to expose him gradually to them not remove them.
Talking about feelings with a neurodiverse child is also pretty useless. For a child with ADHD of his age, talking therapy doesn't work. I'm sure it's great with an anxious teenager who will go along with CBT, or an adult who has ADHD and wants to understand their own brain. Not with DS.
We do use something like NVR, which again is working. Just very slowly.
As I say I'm a scientist, and I'm not going to respond to everything individually, but I do investigate all possibilities that have been put to me for their effectiveness, so I won't say "that's not effective, neither is that, that's just snake oil" for every suggestion. There's a lot of snake oil out there.
I do know what we need but we just can't get it. We KNOW we need to be calmer and less reactive. We KNOW we need to learn how to de-escalate. We also know that we need violence to have zero positive outcome (not attention, not mayhem, not "you need to calm down with a screen"). We just can't get help to put it into place and to get our own mental health in order.
And yes, the police HAVE TOLD US TO CALL THEM. Bore off if you are going to accuse us of wasting police time.
Now some new answers
There may be FASD though he's pretty bright. It would not alter the strategies for behaviour we don't think - if he has memory problems, we work on them, if he has a spiky academic profile, we work on that, we aren't at all sure there would be a value in a diagnosis and they can be expensive and long winded and frankly his school needs no more excuses to write him off academically.
It's not like we think he's just an annoying child who doesn't try/randomly decides to hurt us and have no insight into the reasons for his difficulties.
We could possibly beat down PAS door until we got an FASD diagnosis but what would be the point?
We have done bits and pieces of NVR and the SPACE approach which is what we use for anxiety is very close to this. It hasn't been mentioned by SS but it's worth asking, as I say they have not told us what they offer, only suggested the GP.
We know what we rejected from PAS, it was Theraplay, all the other therapists we've spoken to since have said it's unethical to offer therapy if there is a 6 month commitment whether it works or not, but PAS said we couldn't have any more therapy unless we did that one. They don't offer any evidence-based therapies for his profile anyway.
The Positive Handling has always been put to us as restraint etc. but we don't do that (but I'm sure I could have misunderstood). Another one we could ask SS about.