Wtf. How is that going work? If the building needs to be reopened for students then Estates need to come in as well. Then there's additional travel arrangements for the kids, plus the Health and Safety inspectors, plus first aiders, plus reception staff.
That's not forgetting that whilst these teachers are delivering lessons and doing their normal prepping, marking etc they'll also be expected to provide online learning for other students, video meetings, and more than likely do CPD training because the majority of teachers have never done remote learning. If you think teachers are going to be having one big holiday then you're having a laugh mate.
But none of it matters because if the government say the buildings are shut then they're shut.