I should begin by noting that I worked in Great Yarmouth for a time in the 1990s, as did two friends of mine. The school concerned had a bad reputation then, and the area in common with many coastal towns has been in decline for many years.
I have read the behaviour rules, and some of them I fully support (full sentences, don't interrupt, be on time and no mobile phones for example), but others are petty, and will fall into disrepute when no doubtless some teachers do not enforce them. There seems no basis of reward or benefit or encouragement in any of them, and I fear that for some, isolation may even be seen as a good thing. I can imagine some parents who might have considered this school as an option for their children's secondary school starting next year will not do so, fearing that it is too draconian. Prospective children may indeed start to plead with their parents not to consider this school.
The other thing that struck me was organising a meeting of parents at 5pm. The very parents who could be the most supportive will probably be those conscientious ones who will be at work at that time, or preparing an evening meal. Or is the time deliberately set so that there will be a low attendance and the Head has few questions to answer. We shall see no doubtless.