Thought I'd update, now i'm not as cross as i was, lol.
The Ed Psych refused to make time to go to the SN school with our Portage Worker, so still hasn't been there.
PW spent an hour on the phone with her on the Fri (day after pre-sch visit) and spoke to me afterwards, was totally frustrated with various comments.
'they do know sending him there won't fix him don't they?' 
and others.
Anyway she came here on Thurs, arrived late, and i'd warned PW that we'd be packing up at 2.45 to go on school run.
EP was all sweetness and light and didn't seem like she was even going to mention the school so i brought it up.
Said i know you have concerns but we are really keen that he goes there and have reassurance from the head that is will be possible to change schools if needed in the future.
She kept going on that where she came from (diff LA) it was different and not easy to change schools - well i had checked beforehand that here at least if you are moving from SN to mainstream you are top of the list, catchment areas etc are irrelevant. so he will go to wherever is recommended/suits him best.
She also said she'd read his Griffiths Development check report which is why she thought he was at 7months - that was only his fine motor skills for one thing, it would have said he was walking if she'd read it all properly. And, at the time i complained that the Griffiths check had not shown him at his best as he was still refusing to cooperate with a stranger present, let alone one asking him to do stuff.
Anyway, she was entirely aggravating!
The PW came round again on that Fri, next day, and we had a long chat. Again reassuring me (& DH) that the SN school is the right place for DS for now.
She also said that the EP had spoken to PW's boss after her home visit and made the unbelievable comment that:
"well that bit of his brain will grow back won't it and then he'll be fine again"
& 
makes me so mad.
Anyway, sorry this is long, we have filled in out Appendix A, and added in the 'any other info' bit at the end, that:
'all of the professionals involved in DS2's long-term care agree wrt this SN school, the EP seems to be a lone voice in disagreeing and we feel her opinion is incorrect as she has only met DS2 twice and never been to the school'
Hope that gets the message across and she maybe even gets a rap across the knuckles