Non-see through white blouses for 12 year old

[BinkyBuntyFintyCunty]

We are struggling to find white cotton school shirts/blouses that aren’t ‘see thru’ for my 12 yo. She doesn’t want her crop top or bra showing through as much as they do. Currently, she is keeping her blazer on or wearing a t-shirt under her blouse but she is going to roast in the warmer weather (even thought the coolly dressed blazer police probably won’t announce blazers can be removed until 23rd July!).

Has anyone found some cotton blouses that aren’t quite so thin/revealing?

Thank you

I should have added that the Uniqlo Oxford shirts seem to be an autumn season thing, but worth looking out for. They do very small sizes (it is a Japanese brand) and the shirts are good quality cotton that last for ages. There is normally a good choice of other straight-forward basics, and it was first port of call for teenagers not particularly into fashion. There is a big branch near Picadilly Circus for those who make occassional trips to London, or mail order.

We had a big hunt for plain white blouses when DD was about to start sixth form, and it was surprising how hard they are to fine.