Well, curiouser and curiouser.
Ds's teacher approached me after school to tell me he hadn't done his feelings diary, but wanted to do it at home with me for this afternoon's section - fine. Then I asked if she'd seen his statement yet - yes. Asked if/when there will be a meeting to discuss and plan provision against targets? "Well there will be yes. Actually there's a letter in his bag today."
Then I mentioned the two assessments (SALT and functional handwriting) that came out of his appointment at the ASD assessment unit yesterday and have been referred to be done in school and she went off on one about how unfair it is to take children out of class to do handwriting groups and how much he objects (seems he kicked off about it today) and how the statement says he should have 5 minutes a day of handwriting input and how are they supposed to facilitate that etc etc. Also said that the targets either aren't achievable or are impossible to track and she doesn't like the statement, basically they can't meet the provision and the whole thing is ridiculous.
SENCO kept going back and forth and circling around us, eavesdropping (I didn't include her in the conversation, because I wanted to speak to her separately to make sure a meeting was being arranged) then she went inside and a minute or two later the Head came out, all flustered, said to ds's teacher that she had an urgent phonecall and scooted her inside!
Talk about bloody blatant! I was suddenly left standing outside a closed door a bit shell-shocked, before limping home and eventually arriving at - absolutely steaming mad. 
The 'letter' in his bag was a flyer for the local ASD support group's autumn events. 
So, I came home and phoned Parent Partnership. They were really good and are going to come with me to any/all meetings from now on. Dh used to come, but he is starting a new job next week and won't be able to anymore.
General feeling is the school objected to the statement and said they couldn't meet his needs, but the LA told them to lump it.
I am writing a rather curt letter to them this evening asking for dates for a meeting to discuss the statement.