One thing i will never agree with is the locking of/refusal to use toilets in schools. The use of a toilet is a bloody basic human right surely?
Admittedly i do have OCD about toilets, and an irrational fear of having an accident, but the way they were policed and locked down when i was in school still has a negative effect on me 13 years since i left the bloody place, it was like a bloody prison.
All the outside doors to the school were on electronic timers and could only be opened from the inside until the last 5 minutes of break time/lunch, so if you went out, you weren't getting back in until then, or someone let you in! Lunch was split and only had the loo open from the last 5 minutes of first lunch break, BUT you weren't allowed on the corridors as still lessons going on so usually couldn't go if you had first lunch, or else you'd be late and get detention from your last class.
They changed rotas daily of which teacher had the toilet key, and they would go and have THEIR break in the staff room and have a cuppa and a wee and chat before they bothered to come open the toilets with 5 minutes to go. Then expect every girl who needed the loo in a school with 600 girls, to be able to go, with only 3 working cubicles and ONE loo roll being passed about, in 3 minutes so they could lock up again before end of break. They would stand outside, repeatedly yelling at you to hurry up. It was an 8 cubicle bathroom but they never fixed anything, at least one or two would have no seats, one didn't have a bloody door, and they were proper floor to ceiling doors and pitch black once shut and half had broken lights so were unusable by any but the brave. The room was packed like sardines, with a distinct queue per cubicle, but the popular girls would push in and ignore the queues, so those like me got stuck waiting til the end. A few times the last users got locked in while they were still on the loo and the teacher buggered off, how that never happened to me i don't know.
The only other toilet was in the gym, but it never had loo roll or soap and the gym door was locked apart from letting the current lessons students in to prevent thefts from bags.
They did have the pass cards if you had say, a water infection and got a doctors note you needed toilet access, but first you'd have to go to the office, wait for them to actually appear from out of the back, find the rota, tell you who had the key that day, go disturb their lesson to get the key, go to the bloody toilet, (get held up by randoms who were skipping classes who wander in to go or do makeup or stand about smoking/chatting who you had no control over getting out til they wanted to leave) go give the key back and go back to your lesson. It would take a good 20 minutes, and the ridicule you got on return that "Clearly they went for a shit, look how long they took!" (shitting at school was a mortal sin you would never live down, the bullying for it was horrendous) and quite honestly the faff to get the key took so long, that if you had a bloody infection and sudden desperate need to go, you would never have made it in time anyway!
I remember in year 4, a poor kid, asking to go to the loo, being refused, then peeing himself in his chair when he couldn't wait. The teachers reaction, simply "Why didn't you say you were that desperate?" He bloody well did, she didn't believe him!
Whether the crazy lack of toilet access actually played a part or not i have no idea, but i doubt years of having long periods of no access and forcibly going when i had the chance didn't help, i now have an unstable bladder. I can need to go at any time, full bladder or practically empty, and i get 2 minutes or i will have an accident. If i'd had this in my teens i'd have been having accidents daily, its ludicrous "rules" like this exist, its not like we decide when we need the toilet or can plan it, if you need to go, you need to bloody go!