Oh, bloody hell, Aloha, that's awful. Sorry - i missed this thread yesterday.
You poor thing. How bloody outrageous.
If they can't 'cope' with him at lunchtime, then surely they will HAVE to agree, now, to supporting him to get a statement? Can you get advice from ipsea?
I was going to say that your post "Try to get him to work on a social story, role play, lots of stuff. Don't tell me that it has been going on for ages and DON'T tell me that he is 'hurting other children on purpose' and 'being violent' which totally misses the point of his frustration and inability to fully understand social behaviour. " seems to contain many of the answers, not just to helping your Ds in school, but in enabling the school to communicate with you in a useful way.
You need help, don't you? Try ipsea, the autism woman - and also, perhaps, Parents for Inclusion - who are very good at advising on how to approach / demand things form the education system. They helped us with stuff around a flat access / sympathetic school.
I'm not sure that they have the right to tell you to collect him for lunch...I'm sure you can't wait to fetch him and cuddle him in your arms, but it is outrageous that they have approached it like this. Surely they will have to agree to supporting statementing...they've hoisted themselves on their own petard by doing this!!
Grrrrrrrrrrr on your behalf.
And big hugs and smiles to your gorgeous sweet funny and v clever DS.