Can they actually insist he leaves?
He now has an EHCP and the current school is named on it, as is 1:1 support (which he already has).
They cannot actually insist he leaves, but unless something major changes (rearranging school, new SENCO) they are making it plain they don't think they can support him. Meaning they are not motivated to support him.
The main issue we see is that they just keep doing the same thing that isn't working, until there's a crisis, when they throw up their hands and say "we are SO GOOD at SEN that it must be that your DS can't cope in mainstream at all".
So we've no real guarantee that won't happen again.
Also, he does not have aggressive behaviour at school beyond a couple of incidents of spitting/pushing (as in 2-3 in 2 years) but sometimes in difficult circumstances he can. So we are worried they will push him to be aggressive and exclude him. They have already talked about a PRU.
20 minutes would, indeed, be the same price as till 6pm for DD.
I'm inclined to ask current school if they will be paying for her breakfast club and after school club every day.
We are unlikely to be able to get a nanny for DS as he is harder to handle at home.
I wonder if a CM would also charge for the full after school session, to be honest by the time a CM had picked up all her school kids including DD and we'd driven home from another school, the CM would be walking past our house/just arriving at hers in the car. It would be a case of a CM for a journey home rather than any actual care.