I teach y10 and y12, but I'm pregnant and have a very long commute by public transport, so I'm sorry but I won't be going back into school.
& I'm sure plenty of other teachers (inc primary) will be in similar situations or have shielding family members etc, so I suspect the quality of teaching will be quite poor, with lots of teachers covering classes they're unfamiliar with.
Also I suspect lots of parents will refuse to send their children back in and will be expecting the same level of work sent home. It's going to be a logistical nightmare.
Perhaps multiple years of primary classes will be put together & given childcare busywork rather than a proper curriculum.