As someone who works in a school this is the reality for us.
Children sit in rows with two to a desk side by side. They have all their resources and are not allowed to stand up or move around unless they ask.
In the morning arrival can take up to 20 minutes as the children need to wash their hands and go to their lockers to put away their things. This needs to be done in small groups and has to be staggered because the year group next door uses the same corridor for their lockers and we cannot mix. So picture 60 young children doing this and you will understand why it takes so long.
At lunch the children eat their lunch in the classroom. The staff in their bubble alternate having their lunch so there is always someone supervising. As for the staff eating their lunch, they eat their lunch in the large hall where every year group has their own table which is far apart from the rest. Thankfully there is a fridge, microwave and kettle in there, although they too need to be wiped down between uses.
We don't have to wear a mask or visor in the classroom with our bubble but we do if we're anywhere else in the school.
As for the children at lunch, we clean their tables before and after and they need to clean their hands at both times too. Anyone who has young children will know how messy they can be.
Play time and lunch time play times are staggered so year groups don't mix, and we wipe down the toilets, sinks, taps and doors every hour.
PPA is covered by our lvl 4 TA who stands at the front of the class well away from the children wearing a visor and gloves. The TAs in the room assist since we want to reduce the amount staff move between bubbles even if this is allowed.
Parents have to wear a mask at pickup and drop off or they are refused entry.
At the end of day each classroom is cleaned by the staff in the bubble. So yes that means TAs and teachers when normally they'd be doing other things.