I would doubt it's a school uniform as such, as it's staged with a 'studio' back drop. And usually, photo's of pupils would be in a group form.
Did the records this photo was found in, relate to any family history. ?
As for boy or girl, it's hard to guess.
Could these be Barnardo's children, which was established in 1866.
I think, but not sure, some children were photographed for potential adoptive/foster parents.
Steve.
