So much has just not been thought through... yet the govt is not leaving schools a lot of time to do this.
I think this is the crux.
There are so many possible permutations of what will be needed over the coming months and schools are in the impossible position of having to try and plan for all of them.
Back in September as normal - full timetable, plus catch up needed, particularly for current year 10 and 12
Back in September but in bubbles/part time - new timetables worked out, possible reduced subjects, plans needed for current year 10 and 12 and exams, plus for current year 9 and 11, plus home schooling lessons
Plans needed to accommodate.possible local lockdown or quarantine of groups/ whole school if necessary - on line arrangements, IT provision and so on.
Every option here needs time to plan and implement and also money and resources to sort them.
I work for a major supermarket, within a few days of lockdown they had leapt into action - hand sanitizer was everywhere, signage and one way systems introduced, vulnerable staff identified and policy in place to isolate them, screens and shielded erected - this is because they have resources, logistic teams, probably contingency plans already in place, necessary equipment already purchased and ready to go. Schools aren't in the same league as this. They don't have resources, logistic teams and crisis planners at their disposal. Having been a school governor and worked closely with several heads and slts who were excellent at their jobs I can confidently say that none of us had any experience or knowledge of running a school during a global pandemic.
The leadership and facilitating for this has to come from government imo. They need to provide resources and expertise to schools.