Thank you so much for all the responses.
I take on board completely that I was unreasonable to expect a report and take responsibility that I should have been pushier - tbh, it never occurred to me that she wouldn't offer SOME feedback, oral or written, considering what we had discussed when he started at the school.
I now understand I need to be VERY clear with the school if I want any feedback about my son and will bear this in mind as he goes into year 2.
The resources and tips posters have given me on here have been invaluable.
foxhasbigsocks - yes, that was the book he was on. The links to the reading charts are EXACTLY what i needed. I now have an idea of where he is. THANK YOU!
Also, yes, you are right, his previous setting did almost no focus on reading and writing, and what there was was in a different language.
He was VERY reluctant to do it with me at home, lost of fights and tantrums, I really have tried my best. The judgey comments about how others wouldn't allow their students/child to be so 'seriously below expectations' are just hurtful and unnecessary. he's only 6, he'll catch up.
He now will do reading and writing practice every day at home, with very little resistance so I think he will make a lot of progress this summer, and I have loads of links and ideas now on how to help him.
He will of course be having LOTS of fun and rest too, I'm not a tyrant!
Thank you all for taking the time to respond.