How do i fight our LA for ABA?

[Looking2Move]

My autistic DS is almost 7 years old and at his second school, (mainstream for 2 and special with mixed complex needs for almost 2 now).
We are again in a position where we feel the school is not meeting his full learning potential. The class of 11 has very loud boisterous children in and he cannot cope with the noise. He has a one to one LSA for specific work tasks but is then left to free play. Our concern is that he is in the wrong environment for learning yet again.
He sees a neuropsychologist for 3 hours a week for early intervention work, she doesn't call herself an ABA tutor but her techniques involve ABA and CBT. The school are happy for him to finish school at 1pm on a Monday to have therapy with her, and she has also met with school to guide them on some techniques she uses on him. She is very expensive and we pay privately for her.
My question is.... We are going to ask for a change of placement for our DS to be taught by her full time (25 hrs a week) under 'education otherwise'. Is there anything I need to prepare aside from reports to prove he is developing with this lady teaching him? He has spent two years at this special school tracing over letters (when he writes independently for us at home) and they do not do reading with him aside from pointing at pictures in a book. Again he reads simple books with us at home...
Having fought our LA before I am bracing myself for the stress and fight ahead of me....

I should also add his annual review is coming up mid May...
TiA

I think you have to prove that no school is suitable for DS before the LA would agree to EOTAS and you would have to have evidence.

Just make sure the LA don't think you are electing to home educate or they will effectively wash their hands of you. Some info here:

www.ipsea.org.uk/home-schooling-and-education-otherwise

Thanks @Ellie56 for your advice. I had a call with IPSEA last week who mentioned the difference between the two homeschooling routes....

EOTAS is different from home ed , as the latter is a choice you exercise (in theory but I think for many it's not a choice at all) and the LA dont have a legal obligation to provide special educational provision. EOTAS is when it has been agreed that school is not the right placement. EOTAS wont be named in section I as its not a 'placement ', but should be in section F

I imagine its quite a battle to get LAs to agree to EOTAS and you would need solid evidence from an educational psychologist at the very least to say school isn't the right environment. The LA do have to have regard for parental preference, as well as a duty to provide a suitable full time education. So ,I guess they would argue they are fulfilling that obligation with the current school placement, unless it's not working which you should be able to ascertain by evaluating his outcomes at the next AR. There is a really good support group on FB where they may be able to advise you.