If I was in charge I'd have different guidance for primary, secondary and post-16.
Primary: in for education 4.5 days a week, strictly in class bubbles with at least 2 members of staff per bubble (extra if SEN children need it) - staff cover each others breaks. Extra funding to staff this, no movement of staff between bubbles, normal PPA cover teacher assigned to a bubble as a member of staff. Final half day for teacher PPA, parents asked if childcare needed - if so children cared for by TA in bubble but not education, can stick on CBeebies if they wanted, as long as children are safe it is fine. Each bubble had own toilet and sink area.
Secondary - blended learning, may look different dependent on school and children. Lots of extra funding to toilets, sinks and extra cleaners.
Post-16 - most learning online, but with some face-to-face contact each week. Contact can be increased if students struggling at home, area provided for students to use school technology if needed.