DS1 went to a designated Autism provision within Woolston Community Primary in Warrington. Its KS2 focused. 8 pupils 1 full time specialist teacher two highly trained support staff and other well trained staff who are pulled in as necessary.
He had daily physio and regular speech therapy (communication rather than ability to speak). He learnt all about his Autism and how it can make him react. To take responsibility for his anxiety if it builds and withdraw himself from situations if necessary (so, so valuable).
DS joined in yr 5 when we moved to the area and went from being well below age average academically to being near where he should be which ment he's gone on to be in decent sets in secondary. He sat his SAT's having previously pretty much refused to mark make at school and even got a level 5. Again he's in a provision at secondary but managing core subjects mainstream and just about holding his own.
The whole Woolston community school was rebuilt several years ago and the DP rooms were very carefully designed with a low noise main classroom, a soft room and quiet work spaces off it.
Its very highly regarded by those who've been fortunate enough to have their children go to it. Council allocate the places and EHCP essential.
DD is yr1 and in mainstream. Shes under a consultant but no diagnosis. She has had annual blocks of speech and language, the class TA has been trained in TALK about for group work on social skills and both the TA and I went on several story board/ comic strip training sessions. We also have support from an Autism nurse. Do you have a consultant who would reffer on to some support and development services?
Our local NAS in Warrington are a lovely friendly group with day and evening groups. It may be worth trying an NAS group for some direct local knowledge.