I remember your original post - I responded to you then.
Don't be mad with yourself - it's not justified.
I agree - you do not need to go to the expense of a FOI request. You can do this under DPA.
I wouldn't go back into school to look at them again.
I would just send a letter to Head sttaing that you came in to see the file today and it was obvious that it was incomplete and that you are now formally requesting a full copy of all the files held on your child and any documents that may be held seperately in SN Files to be sent to your home address.
That letter then documents the fact that information has unlawfully been withheld from you. useful at a later date.
You can also sk for a list of all documents they have provided to you.
That way, if you want to take further action in the future and more information miraculously appears, you'll be able to show that it wasn't availble to you when you asked.
Please don't think this is a criticism but you're focusing on the school files when your energy may be better spent elsewhere.
Ok - youve just discovered there is a problem and that, unbeknown to you, your DD has been identified by school as having SENs. I can feel your frustration and anger. I would be feeling the same way.
What next?
How recently has her IEP been updated? If not in the last 6 months demend an update.
Do you know the date of the next IEP review date - if not ask school in writing for the date. Tell them you wish to participate in the review and any potential amendments to the IEP. that may be required.
As the current IEP was drawn up without your input is it accurate and SMART? If not ask for an immediate review as it's not acceptable.
These are the basic steps to get her some meaningful support and also build up your case for possible Statement.
Your issues with obtaining a copy of the school file can run in parallel but are really secondary to getting the IEP right. The Annual Reports that school send home shoudl also show your DD's level of attainment (SATS levels etc).
Please don't beat yourself up. You have no cause to. I think part of it is shock at the realistaion that schools, which we naturally tend to trust, can act in such an underhand and devious manner.
Best wishes