I finished my secondary schooling in 1989 at an all-girls school in the UK.
Most CP was quite mild, with smacked legs, bottom, some slippering, etc. I had a few male teachers but there is no way any would even contemplate using cp on a girl. I do not care what anybody says, it just did not happen.
As for having a go at the gym mistress, it’s very unfair. Admittedly most were very strict and would slap the back of your thighs from here to next week. But that was the disciplinary style in those days. To suggest the innuendo that you intimated is not on. Most girls got on very well with the gym mistresses, I know I did. They were great fun. If you played up you deserved a seeing too.