Apologies for the long post.
TLDR: If the UK had closed its borders like the Channel Islands did, would you be happier going back to school 100% in September (teachers, parents and children)?
Long version!
There are lots of threads on this subject at the moment. This will put my TLDR in a bit more context.
I am in Jersey. We closed our borders (totally, other than for exceptional emergency 'lifeline' travel, which had to be approved by our States of Jersey government) from March until July 3rd.
As a result, our figures are much lower than the UK's, and we are currently in the final stage of our 'safe exit framework' from lockdown (see gov.je for more details about that)
We started opening up ages ago, internally. At the beginning of June we had over 93% of all primary children back in school, and all secondaries went back (albeit on a rota) towards the end of June. Again, very high take up, and absolutely no opposition from teaching unions at any stage from the primaries opening onward (the same unions as in the UK). In fact, the union reps on the island were extremely supportive of our island government's decision to open schools again. (And yes, I am a teacher, and have many teaching friends, some of whom were shielding or vulnerable, but none of them have objected to their own children going back to school, and they themselves are going back in September because they feel comfortable to do so.)
In addition, although we have now opened our borders, travel is still limited in availability, and everyone who enters the island is tested before they cross the border. They also have to fill out a form which is scrutinised about where they've been for the past 14 days, and where they are staying on the island. France is currently 'amber' here, so you have to have 2 tests and isolate for 5 days if you come in from France. We also have a track and trace system that is robust and works (personal experience!).
So far, out of over 33,000 people coming into Jersey since July 3rd, we have had just over 10 positive test results and 1 community transmission. Everyone on the island goes about their business pretty much normally now - masks are not compulsory in shops, only on buses or at the airport - and although it's been hot, our beaches have not been overrun with people (mainly because there are plenty to go round!) and as locals we don't feel we have to stay trapped in our homes just because people are heading to the beach.
Also, school holiday clubs are running for those who need them, although I'm not sure on the situation with before/after school provision for September (doesn't apply to me any more) friends who previously relied on it don't seem to be freaking out because it won't be available (although that is a pretty small sample, and the reality for others could be different).
Anyway, to (eventually, sorry!) get to my questions - would all the people here calling for more delays to schools opening in the UK (both parents and teachers) be happy to go back if the UK had closed its borders like we did? I can't really see anything else that has made such a difference between you and us. Would you be happy to open up 100% as normal in September, as we will be doing across all sectors of education, with full union support? Would you be happy to send your children under these circumstances?
We are not complacent here, far from it. We, too, have a 'temporary' mothballed 'Nightingale' hospital if we need it over the winter. But our local figures are published daily Monday-Friday, so we all know how many active cases we have and where they have come from. I know it's easier on a small island though - perhaps that is the other main factor, along with borders closing properly?
If nothing else, I'm so pleased I don't live on the mainland any longer - there are lots of disadvantages to living on a small island, but thankfully this pandemic has highlighted many of the advantages too.