Right, am back.
First of all, he doesn't need a diagnosis to get help. They are seriously messing you about here.
What did they say at the NHS assessment in January?
If there is significant concern enough for him to be going through assessment, he should at the very least be on School Action, with an IEP and the school should be putting in appropriate support for him. It definitely sounds like the teacher is aware of his difficulties, so there's no excuse for them not putting in the support - they have absolutely no excuse for not working out a plan of support for a child they know has problems.
To be honest though, if he's that unhappy there, has no friends he's attached to and they are that neglectful of their duty/responsibilities, I would seriously be looking into moving him to a different school, if possible. As you said, he has a number of years to go in that school and they have already shown their colours with regards to SEN.
If you really want to keep him there, you need to borrow my steel capped butt kicking boots and Carrot's pointy stick and head into battle I'm afraid.
Find out the number of the Inclusion Team off your LEA site as I mentioned before and call them for advice, then do the same with the Ed Psych service - I contacted both myself and if I hadn't, my ds would still be without support and probably have had a breakdown by now.
IEPs and statements aren't just for academic achievement, my ds and others I know of on here are actually very able academically, but struggle with social and communication skills and in some cases appropriate behaviour as well. The school doesn't only have a responsibility for his academic education, social and communication skills etc are covered on the curriculum under SEAL and if your child is having problems in this area the school should be doing something about it. At the very least he should be on School Action and you should be involved in developing and regularly reviewing an IEP for him, along with his teacher and the SENCO.
Get hold of a copy of the SENCOP (SEN Code of Practice) here and familiarise yourself with it, then inform the school that they are failing to meet the terms of the SENCOP by failing to give your ds the support he needs to achieve either academically, socially or both.
If you want to keep him in that school, you are probably going to have to grow a rhino hide and make yourself unpopular - but if that's what it takes to get your ds the support he needs, it will be worth it - I promise. Our Head looks for somewhere to run to when he sees me coming these days
but I don't care, making sure ds is happy and supported is all I care about.
Keep in your mind that you aren't asking for anything that your child isn't entitled to and you have right on your side.
You could write a letter to the Head (so that it goes on record) detailing exactly what you expect them to do to support your son and where and why you think they are failing him - mentioning the SENCOP in there somewhere would help as well.
If they still won't listen, contact Parent Partnership (again details should be on your LEA website) and get them to talk it through with you and then arrangen a meeting with them in tow to thrash it all out.
Sorry if I seem a bit ranty, it just makes me so mad when schools try buck their responsiblities and let children down. As Wendihouse said, they have a duty of care to your son that they are clearly failing to provide.
It makes me so angry to keep hearing this story over and over - thank heaven for places like this where we can ask for support and information. I would have been lost without MN SN board and its mostly thanks to advice and support I've had on here that my ds is now getting much needed support - more is still needed, but I've toughened up over the past couple of years and he WILL get what he needs to see him through.
Good luck and please come back and ask if you need anything else.
Good luck.