Wordfactory -- that sort of regime operated in the high school my oldest DCs attended in the US (not a deprived area at all). There were no uniforms but as a rule a stricter tone by teachers and administrators and far less tolerance for students (this is what they were called) stepping out of line when it came to showing respect for the personal boundaries of other students and respect for teachers conducting classes. Sexual harassment, or harassment with racial, ethnic, religious, sexuality or political overtones were completely banned.
All students and teachers wore IDs, all students no matter how far they had to travel in a huge building with 3,500 other people on the move in the corridors at the same time between classes had to make it to their next class in four minutes flat - consequences for lateness were severe. Clocks were everywhere, and the time was shown down to hundredths of seconds. Late students could not go into their classes and had to swipe their IDs in the corridor at the security station; three such swipes in a semester meant intervention by the Dean's office. You were expected to just run faster (and keep to the right) if you were going from swimming on the ground floor at the south end of the building to French on the fourth floor at the far north end. You could ask for some switching around of classes if the situation was impossible but this wasn't guaranteed, and you could use the one lift if you had a request from a doctor for medical reasons. Late assignments -- lose ten percent of possible grade per day (important in a grade point average system). School started at 8. At 7.55 am you were guaranteed to hit a traffic jam in the vicinity of the school. At 8.01 am you would see maybe one or two students hurrying to the building.
Backing up the teachers was a raft of counsellors and deans of discipline. There was a school within a school for students with behavioural problems that were resulting is classroom or public area disruption -- in the US, public school districts whose schools that expel students still have to provide educational services for them.
OTOH, every student had a locker and within the classroom, there was quite a wide latitude allowed for student dress (no offensive slogans or too revealing clothing allowed, consequence was to wear a school gym t-shirt over whatever you had arrived in in the morning) there was a certain amount of give and take tolerated between students and teachers. For the most part, that latitude was not abused. It was also very easy to get in touch with teachers via e-mail or phone, and teachers didn't hesitate to get in touch with parents. It's hard to see how British schools that treat teenage students like children or nuisances in many ways (no lockers so no sense of belonging and actual difficulty carrying everything around all day; uniforms so no sense of acknowledgement of individuality or personal autonomy) still expect students to demonstrate school spirit/engagement with the learning process, and responsible and respectful behaviour.
In general, I think schools in the US are far less accepting of the idea that allowances should be made for anyone for any reason. Academies and charter schools that are set up in deprived areas generally start fixing educational achievement problems by first instituting strict disciplinary policies and even uniforms.