Pink thanks so much, that's actually really helpful. I will try that too. I hadn't thought of doing homework right after school. ds always gets really cheesed off about homework but maybe right after school would be good.
I know what you mean about him feeling safe in school. I know ds feels a lot of disorientation and anxiety, but the school are not interested. When I tell them, they imply heavily that he ought to man-up, which is not at all helpful in an anxious child.
I think the other thing I need to do it become super-organised myself so the cooking is done before he gets home, as much as possible and I am available for him and not flapping around like a wet hen. There was a lot of wet hen stuff this year especially getting out in the morning and while cooking and I don't think it is helpful.
The special diet for him is actually helpful as it means I've been able to insist on taking him home at lunchtime. I realised how much it helps when we were coming back after lunch and watching through the fence as the lunchtime supervisor roared at tiny children for touching the soil. ds recoiled at it and I was so glad he was on my side of the fence until the bell went.