My school was all boys so I have no real experience of how girls were punished in schools. But at my school you could end up getting the slipper for just about anything, I remember a boys getting it once when he was caught whistling at some girls who were walking past the school.
I get the impression that girls were disciplined less harshly than boys in most mixed school, probably as girls were better behaved than boys.
However I think that in many British school even a well behaved young lady like yourself may have found herself in the Headmasters study, bending over for a few sound smacks of the slipper, across the seat of your pleated school skirt.