I am sorry but I find this very hard to believe, no master in my school would hand over the disciplining of a classmate to a girl, even though it would have been excellent classroom entertainment, I don’t think any of my female classmates would have wanted to participate. They were quite happy to watch as us boys had our bottoms roasted at the front of the class.
It was embarrassing enough for us boys just being punished in front of the girls. There were quite a few masters who liked to put on a bit of a show when administering a whacking, for example, a boy’s position touching toes, bent over the back of the chair, bending over sir’s desk, asking a girl if she could stand up from her desk so the male victim could bend across it.  Also ordering the boy to bend over further to tighten his trousers