A ehcp would really help him in school and possibly have a meeting with his sen to discuss your concerns
He has an ehcp.behaviour plans and ieps In place, I'm just warry about what I say as the school are also transitioning him from school to his sen school soon, as there are says they take him and days were the parents take him.
But I will just put a polite note in his communication book
I have and wished I would of spoken up more for him back then as I didn’t understand it myself as yet maybe remind them that he can’t help it and will become overwhelmed