Hello everyone and thanks for replying.
Sorry I just posted in frustration without really giving much information.
TotalChaos that is exactly it, he can't cope with noise and crowds and lots going on at once.
wasuup I have observed him at school and can see it (I am a primary teacher and have worked with autistic children).
His main issue is not listening (although the school now think it's not a deliberate not listening, more a not being able to hear or take in the information)
He doesn't communicate, rarely answers direct questions, cannot cope in group situations like carpet time and assembly, and even standing in line for very long, gets very little work done unless he's working alone at a workstation with a ta, has almost constant TA presence with him at school, is defiant, physically aggresive towards the adults if they touch him or try to physically move him.
Hides under the table, spins things for comfort, doesn't cope well with change to routine, runs away from adults at play time when it's time to line up and go inside...
No punishments work, he couldn't care less about rewards, stickers, pasta jars, incentives. If he doesn't want to do something he doesn't seem to 'get' why he still has to do it.
I will order that book TotalChaos. He has an appointment with a peadiatrician in a few weeks, the school are arranging for an Ed. Psych to come in and assess him. They think it is a communication problem, I think it's more a choice DS has made and he understands perfectly well what he is doing. He is bright, socially aware, can alter his interaction with people depending on their age, shows empathy, and talks for England when he wants to.