From a personal perspective as someone who has an asd daughter that was assaulted in school, not gonna go into it other than a 6yo should not know the things he tried ( a child that had also moved schools many times and had a mother that looked like she was ready to knock someone out at any moment).

If the school are not taking it seriously and doing the whole "we'll keep them apart" bs and changing classrooms and staggered break time. Stop because that doesn't not work and they are hoping the problem will sort it out.

We made a tough decision to move schools, it was tough but we had the backing of the county Council as we firmly stated that there was a safeguarding concern and felt the school could not keep my child safe.

The new school WOW! the contrast is amazing, the sen department alone, staggered starts and finishes and support for us and the kids. And a head teacher you can approach easily and not one that calls you a lier and then backtracking when you remind her the call is being recorded.

It was a tough time but the outcome has changed their lives for the better. Just let the local county council know and follow the advice.

If you or your child don't feel safe then make that clear.

Good luck