I will probably be flamed for this but wondered what you would do.
My ds is in year 1 of a mixed year 1/2 class, which ha has been in since reception (when it was reception/ year 1). He is doing great with reading on book band 7, so no real concerns but would value your opinions.
I go in sometimes to help with reading and have noticed that the children who are not so good at reading are heard by a teacher weekly, and likewise the not so good year 2s, but children like my ds are left to parent helpers, TAs etc..
This is ok except it means they never move up to next reading level - only the teachers can do that.
I know my ds is my PFB, but he is a much better reader than some children 2 book bands higher than him, who still need help decoding.
I know this isn't a problem and he reads books from library so he is progressing but only because we do so at home.