I'm overseas.
State schools are shut here until mid October, but private international schools like mine are allowed by the government to set their own dates, & we are going back first of September (to be confirmed whether that's everyone, or just tinies one end & exam years the other...).
Absolutely no one is expecting us to stay open - we're hoping at best to get about a month of teaching in before going to a blend of online & part time in schools. SLT have been very frank that we will pretty much inevitably have a school based outbreak, or even just routine Autumn/new class bugs mimicking the symptoms of covid, & have to close within a few weeks.
Currently we are looking at moving/cancelling October half term to make up missed days or at least keep going online. Christmas hols also dubious - might be slashed to a long weekend rather than a fortnight if we've missed lots of November.
We are eyeing the UK plans like this...
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I think British schools will also be doing the covid hokey cokey for the next academic year, tbh. Starting back in September, but then in, out, shake it all about in an unpredictable pattern for months.