Genuinely, how many heads will do this? I know a few heads who support the strikes, who voted to strike in the NAHT ballot, and are disappointed it didn't meet threshold. There are also heads who are NEU members- I can't believe they will be doing any of this. I've also seen a lot of heads on twitter already saying they expect to close or partially close.
The DfE can want what they like, but I am genuinely not convinced heads will facilitate it. I have also seen a lot of supply staff on twitter saying they will not work on strike days.
Schools might be able to get any warm body (with a DBS through the school) in, in theory, but in practice there's also significant risk in doing so, and I think the risks also need to be explained to e.g. parent volunteers.
Say a parent volunteer was left in charge of two classes in the hall and a child hurt themselves severely (children do stupid things, we know it could happen)- who is responsible in that case? The parent? The supervising member of staff? The head who deemed them competent? What if an accusation was made against an untrained parent volunteer?
I agree we need to build solidarity and empower other staff, but I don't think being doom and gloom and undermining the strikes before they happen is helpful.