As an experienced teacher, I haven't taught in the state system for years because I can't bear being put in a position where I am forced to enforce petty rules that are all about control and nothing to do with education. Schools should not be prisons where children's movements and freedoms are restricted.
Children do not need to wear a uniform to be 'ready to learn.' I teach in a school with no uniform rules whatsoever - the kids can wear whatever they like. We trust them to make sensible and appropriate choices and guess what - they do.
If children forget equipment or books - then we just lend/give them what they need and don't make a big deal out of it. We all forget things sometimes. Why should we punish them for asking them to have too much on their plates? Kids as young as 11 are expected to rush around school from lesson to lesson, going to different classrooms each time, and to different subjects with different equipment requirements. Would an adult remember every little thing each of those 6 teachers had asked them to do/bring to their lesson that day? Probably not. It's normal that they might forget something sometimes and the right response is kindness and understanding rather than shame and punishment.
If children are late, we find out why and deal with the root cause. Very rarely is it children being wilfully disruptive. Most of the time there are issues going on at home or school that need intervention and the lateness is a symptom of something much deeper. Punishing a child for finding it difficult to come to school is nothing but counterproductive.
No child should ever be told no when they ask to use the toilet. That is barbaric.
A lot of the time in these draconian academy schools, children are disruptive because they don't see the point in what they're learning and they have so little control/autonomy over their day-to-day lives. They have to sit in rows and listen and make notes with no choices and no opportunity to move around or chat. If their classrooms were creative, collaborative environments where they could move freely, work on learning projects that they had agency over and understood the purpose of, and had warm and engaging relationships with their teachers, who they saw as allies rather then enemies, then the classroom environment doesn't become a space of combat but one of community, and then you don't need rules to keep kids in line.
I might also add that another reason why so many children are disruptive is because what they learn is utterly pointless and boring, or inaccessible to them. We badly need to shake up the system in this country. A good 50% of children shouldn't be doing GCSEs and A Levels and should be working towards practical, apprenticeship-style qualifications that will lead them to fulfilling work. It's trying to force kids without the interest or intellectual capacity to do formal qualifications in subjects they don't like, don't understand and don't see the point in studying that causes so many issues in school. If the content of what students were learning matched their needs and interests, they wouldn't be disengaged or disruptive.
So many schools have got it so wrong. And unfortunately the majority of communities in which these draconian schools exist are ones with the highest levels of disadvantage, and their approach merely exacerbates existing societal issues in those communities rather than doing anything to improve or enrich those children's lives or future opportunities.