Can't say it wasn't expected.
Headteachers, teachers, school staff, parents, guardians, probably even kids themselves have been complaining about this 1st June 're-opening' date since it was first announced. Unless I've missed it (with so much going on, it's likely!) I've not heard the government properly explain why they think it's safe. All the above have mentioned they don't think it's safe, even @RandoEFC gave a good account of reasons, and they themselves may not feel safe given their own vulnerabilities or perhaps risk to other household members.
It's good the councils have taken it upon themselves to make decisions. Same with parents who don't want to take their kids back. Decision should be up to them and I just hope they don't get punished for it.
Let's face it as well, this government's middle name might as well be confusion.