Not this again.
Of course a policy like that is needed.
We have found children in our toilets who had disassembled sharpeners and cut themselves or tried to take their lives.
We have had students hide drugs in roof tiles of toilets for others to later on take - dealing on premises.
We have found numerous students vaping, smoking (setting off fire alarms regularly, even during official bloody GCSE exams!).
We have found one particular couple having full on sex, and a few others where blow jobs were being dealt for money.
In each case, the teachers who let the kids out were held to account, because at the end of the day, they were in loco parentis.
That is not even mentioning the hundreds of students disrupting the flow of lessons regularly. You're explaining something, ask a question and get hands up, only to get a "can I go to the toilet". You get children leave lessons (with permission or without), creating disruption to those who have to move their seats, those who get distracted, both on the way there and back. You get hundreds of children arriving late to every lesson because they spend 10mins finding a toilet between every lesson. You get bullying, popping heads into other lessons to chat to mates.
If you think I'm exaggerating, please visit an average large town comp.
Toilet passes are a pain in the arse, too, because I have to check every time, because the kid will inevitably not have theirs and I have to look their name up every time. But they're still preferable to the disciplinary I could face if a kid comes to serious harm and I let them out.
I have girls on their periods all the time, too. I apply discretion and I never allow more than 3 kids to go in any one lesson (and yet I have one class where I will have 3 asking to go every lesson, and try to be the first of my 3 max). I make them wait, too. I insist on work being done, because I will often get asked when they have to write something or think independently.
Please do provide an alternative. I'd love for the issue to be solved.