Safeguarding in school

[safefirst]

I've previously asked for advice as we are going through the process of transitioning my son back into school but we keep seem to be hitting problems.
Quick background son came home with severe fingerprint bruising to his arm I reported to police and school, no evidence, trying to transition son back into school he was really happy and then saw this particular TA and reacted to the point of crisis, he is autistic and non verbal, it was so extreme school referred to LADO they advised didn't meet threshold but to talk to TA and put accusation to her and put a risk assessment in place.
So follow on from my previous post the TA was pulled in by senior leadership team and asked if she caused the bruising to my sons arm she obviously denied it, she was then asked if she would move to a different key stage so she wasn't in the same part of the building as my son and she refused, risk assessment was put in place which had a 4/5 for my sons reaction and safety should he see TA, school said if he was to see her it would cause a crisis situation for my son that could lead to him harming himself or others, TA has been advised to avoid my son for safeguarding reasons so if walking down a hall and he is coming towards her she should duck in a room or turn around and walk the other way, on Friday we was in for a transition day as we approached my sons class this TA stood with her foot in her classrooms door blatantly staring at him, luckily he didn't see her as he was looking at a wall display and the teacher that was with us acted fast and stood to block his view, she then with another TA started walking down the hall towards my son, she has been told she can't do this by the headteacher, there is a risk assessment in place which she is totally ignoring, it's utterly disrespectful of her, all I get told is we will have a word with her! This isn't enough, a word, unbelievable, she knows this is a safeguarding risk, luckily the teacher managed to guide my son into a classroom whilst blocking the TA from his view, I honestly don't know what to do, this is a special needs school and spaces are few and far between.
I honestly don't know my next move I have emailed the senior leadership team and the headteacher.

*went against not gay🤦🏻‍♀️

By all means go the safeguarding route as well, but I think your focus needs to be on an early review of the EHCP and pursuing a change of placement and additional therapies via that, and in the mean time pressing for alternative provision. Even if the TA is moved, and the school have made it clear that isn’t going to happen, your trust in the school will never return to what it was and the relationship has broken down.

@Thatsnotmycar I absolutely know you are right, it's just so difficult when ds isn't able to tell me what he would like.
However in the long run it isn't fair to put him in a situation where he could see TA so the best thing is to eliminate that risk and move school.
I have put his name forward for a new complex needs school that is opening and we are going to have a look at one other school which is a bit further away though.
I'm going round in circles with his current placement and ds needs an education, I did explain to the head today we are looking at new schools and she did say she would support that.

@safefirst I am wondering if as a ta she feels safer in ks1 as these children are less likely to really hurt staff if they become unregulated.
I am a ta and some staff will use any excuse or threat to stay with the little ones instead of a class of 16 year old boys who have a lot of physical strength.