how many children can be in a year 2 class

[kiwibella]

My daughter has been fortunate to be in a very small Year 2 class. Hers currently has 17 children and the other Year 2 class has 21 children.
However, due to a teacher's sudden departure higher up in the school, one of their teacher's will be replacing that one... and my daughter's year group will become one class, with one very good teacher, an unqualified teacher, and a TA.
My question is this a legitimate arrangement and likely to be successful?

KS1 used to be limited to 30 per class but I have a feeling that's been removed now.

That many Y2s will be tough for any teacher. I'd def be having words with the school. If it's temporary then fine, I wouldn't be happy if it's going to be that way till July though

3 adults to 38 DC sounds fine (and so schools combine even bigger groups).

In an LEA school, two if those adults would need to be teachers (there always have been unqualified teachers in state schools, but unless old/experienced, you'd expect a recognised qualification). In academies/free schools, there is no regulation of the formal qualifications of teachers.

I feel old - when I was at junior school, it was 40 pupil to one teacher!

I know that class numbers were higher but it has become the "norm" to be around 30 children in a class.

This is not a temporary arrangment. It is an intended change.

I am also a teacher and can't quite comprehend being responsible for the assessment of 37 children!!

we don't know the status of the "unqualified teacher" who has been promoted to this class. She has been a TA in school for several years. School have written to us addressing her as an unqualified teacher. I assume that this means she has been under-taking some sort of training or mentoring.
There is no dispute that she is not fabulous! The children adore her and she has helped many children improve their learning.
The question is around the change in class arrangement to now more than 30, albeit across two classrooms and supported by two extra adults.

thanks tiggytape.
Are you saying that the ratio at KS1 is 1 qualified teacher : 30 children?

As tiggytape says, this depends on the status of the "unqualified teacher". If she is on an employment-based teacher training scheme, for example, this arrangement is legal. However, if she is a TA, higher level TA or support staff it is not.

thanks prh47bridge
I suspect she is most likely on a teacher training scheme, like you suggest. It is a question that I will be asking the school, for clarification.