Yes, some schools may not have been coping for a while and some may have gone under regardless of VAT and now have a handy external factor to blame.
But as has been pointed out as nauseam on these threads, many of the closing schools may have been able to bumble along for another 3/5/10+ years but for the VAT/NI/business rates triple whammy. And it cannot credibly be argued that it is of no consequence that VAT has hastened their demise. (Try googling “but for causation” as another legal concept that illustrates this).
An analogy drawn earlier is that you cannot argue that the care home deaths caused by the disastrous early COVID policies of the last government didn’t matter because hey, these were all elderly people who probably didn’t have long left anyway.
Had these “inevitably but gradually declining” schools not been hit so hard, at such short notice, mid-academic year they may also have had an opportunity to secure their futures a different way. Eg by merging with another school (struggling or otherwise), marketing more overseas, changing from single sex to co-ed. So may not have ultimately closed at all.
"And I am also assuming that many parents will be sending their kids to other private schools. "
Yes, it's likely that some parents will send their children to another private school. For some that may mean only limited disruption.
For others - particularly those in years 10 and 12, it is likely to be a disaster, given that it's highly unlikely that a new school will offer the same combination of subjects with the same exam boards and the same modules taught in the same order.
Then there are SEND kids with emotional/anxiety issues who - even if they can find another school that can meet their needs and which has places- will find it enormously disruptive and traumatic to face such a move at all.
SEND kids with any type of need may be unable to find any suitable school state or private, that meets their needs. Ditto children at other specialist schools (eg religious schools) or in rural areas where there is no logistically viable alternative. Naturally all this was fully considered and planned for in they very thorough impact assessment which the government undertook before implementing this policy. 🙄
And of course many parents won't be able to move their kids to a new private school- the whole point of the VAT impact is that it makes fees unaffordable for them. If a school is closing because parents are dropping like flies due to the fees hike then by definition most of those parents can't afford an alternative private school.
Children on bursaries are also unlikely to find a place at an alternative private school because schools are focusing their bursary funds on keeping existing students in place.
Do you start to see the problem?