I went to boarding school in the 90s (not in the UK) with some absolutely horrific practices. Two minute showers (older prefects had the job of standing outside with a stopwatch).
If you got in trouble (like grounded), you had to be watched at all times by staff or a prefect, they’d literally follow you to the toilet and you had to keep the door open while you had a shit.
They were very anxious about drugs and anything else naughty being brought in. On move in day, everyone was subject to a strip search. Literally a bend over and cough sort.
If you got like a really serious detention, a step away from expulsion, you had to go to this separate building where you did school from until the detention was lifted. If you weren’t doing school work, you were expected to sit and face the wall. The goal was pretty much to break you so you’d apologise and not do it again. I never got a detention (I was actually very good and didn’t stay there very long because my parents realised it was really f-ing weird after a few terms), so no personal experience, but I’ve been told there were students who stayed in there facing the wall for terms or a whole school year.
All sorts of other really messed up stuff happened. Headmaster supposedly invited some students to sleep over in his bed. I can’t say I saw it with my own eyes, but a group of us definitely was delivered to his private residence and came into his bedroom for a chat a time or two (about totally innocuous things and it didn’t feel weird at the time because he was quite jolly, but I’m sure that’s how he must have groomed students). A friend of mine was sexually abused by a teacher and ended up running away from school to go live with him. They lived together and had a ‘relationship’ 🙄 for several years.
It was an international school with campuses in several countries. I think carefully selected to avoid too much probing by authorities. Eventually the main school were I was got shut down (after all the above allegations of sexual abuse came out). They moved all students to the campuses abroad to avoid they being interviewed by the police as part of the investigation. The whole thing eventually crumbled and shut down when enough parents pulled out. I think there was a legal case by former students though not sure it went further than just a report and student testimony being made part of the public record.
It didn’t feel anything other than ‘really strict’ at the time, and I don’t feel in anyway scarred by it 😂 but as a parent now, I’m like, god, that is horrific. 😳