I am definitely not calling leadership teams 'rubbish' in fact I am disgusted that Scottish heads are going to be on call on Christmas Day for contact tracing because their Government are insisting schools open until the 23rd, this is a disgrace!
Anyway, it does surprise me how little autonomy schools seem to have. I don't believe this can be the case where I live in the UK, because schools here do close with wayyyy less cases. I am not aware of any schools here having 2/3 new staff cases a day etc but do close with far less. Whole bubbles here close rather than just sending home close contacts. Teachers isolate too.
I have experience of 3 different schools, a primary, a secondary and a grammar. All are doing different things in terms of day to day stuff so clearly have some autonomy. So clearly the leadership are working hard to do what is right for that particular school. There is still direction from the devolved gov, eg face coverings are mandatory in communal areas.
I don't understand how the school with 66 cases or 2/3 new teacher cases a day are physically able to staff the school to be honest. Cumulatively, by the end of the week, how are there any staff left?
We have had class closures recently due to being unable to staff them, obviously supply is difficult at this point due to the demand. We had 6 teachers off isolating due to exposure to a teacher who developed symptoms on the first day back from half term, another teacher caught it from them and the rest thankfully didn't but they couldn't get enough supply to replace all the isolating teachers.
I am sure they will be looking at avoiding exposure between staff in the future but obviously it is difficult, with only one staff room.
Anyway, I understand your point op because it is confusing seeing posts where sometimes whole bubbles go home and other times it is just close contacts etc, but I guess it is partly to do with Mumsnet being quite England-centric when actually the devolved nations are doing things differently.