I don’t think my experience (late 70s to mid-80s) would make much of a novel. I boarded at a co-ed English school from the age of 10, my parents being long-term expats.
There was plenty of bullying and nothing much in terms of pastoral care. Matrons and housemasters were authority figures rather than home-from-home types.
We had occasional midnight feasts, with staff prowling at night and pressing ears to the dormitory door to catch any sounds. Once they got the better of us by prowling outdoors rather than indoors - we had foolishly left the window open.
School food was pretty awful, provided not in the boarding house but in a central dining hall quite a walk away. Lots of gristly meat and bits of unidentifiable boiled fish, followed usually by a stodgy sponge pudding with lukewarm custard. Our favourite pudding was Angel Delight, especially butterscotch flavour.
Any drinking/smoking/fumbles took place covertly, usually in far corners of the playing fields. Definitely no supervised alcohol parties ever. Weekends involved lessons until Saturday lunchtime, compulsory sport after lunch and boredom/prep/music practice after that. Chapel for everyone on Sunday morning and then we could be taken out for the afternoon by parents or guardians if they were around, so long as we were back in time for prep. “Prep” every evening was universally enforced under strict silence. In the younger years prep took place all together in a classroom with a supervising teacher or prefect; later on we did it in our dormitories.
We were allowed to watch some TV - Top of the Pops was a regular fixture, and the TV room would be full for Wimbledon finals etc. I can’t remember watching much other than that.
We had a booth in the girls’ boarding houses with a single payphone and often lots of girls queuing up with their 10p pieces for their turn to phone home. There was no privacy as you could hear every word the person was saying on the call.
The junior boys’ boarding house had compulsory letter-writing to parents on Sundays (with the housemaster reading the letters before they were sent) but our housemaster didn’t bother with that.
Each boarding house had a signing in & out book. If you went out but failed to sign out it was a serious disciplinary offence. Generally speaking discipline was enforced by “gating” for shorter or longer periods of time. A person who was gated was confined to the boarding house in their free time and was not allowed to change out of uniform into “civvies”. They were not allowed to see parents or guardians at the weekend. Every three weeks or so there would be a weekend leave where we were allowed to stay away over Saturday night. Other than that we were not allowed home for the weekend even if there was a family wedding or similar.
We did not have our own money. Housemaster ran a “bank” whereby parents deposited small amounts of money (£10 per term in my case!) and you could queue up to withdraw what was needed for necessities (stamps, sanitary products etc - I think we had to explain what we wanted to buy). Mostly though we were expected to use the school shop for purchases such as stationery etc, which were directly recharged to the parents.
Well I have ended up virtually writing a novel so that is probably enough from me. We did have fun (probably doesn’t sound like it) 