Which therefore means that if you are a middle class tax paying English person whose children want to go to university in the UK then it makes no sense to pay for private school.
It makes much more sense to move into catchment of a great state school and top up with tutoring, if need be. Afterwards, you will make money on your house when you sell it and that money will be entirely tax free. You can then gift that cash to your children to buy their own house or pay off their student debt. If they stay in the UK the majority of students will now have to pay 9 per cent extra tax for 40 years to pay off their student debt. It compounds with interest and we have just had record inflation so students right now post Covid are going to be utterly shafted with ballooning compound interest.
So private school parents in exactly the same position financially as a state school parent who did not choose private schooling are being penalised for their choice. And are about to be even more penalised by VAT on private schools. All other things like income/educational attainment, being equal.
Those who are going to lose out the most are those on the highest marginal tax rates. What they should be doing is paying cash into their pensions to bring their salaries down below the 100k mark. If they choose private schooling instead, it is costing them a huge amount of money.
My advice to the OP would be to model it carefully and seek tax advice, bearing in mind all your circumstances.
And if you have some money, then apparently Hills Road in Cambridge which is a feeder Sixth Form college for both Oxford and Cambridge, allows boarding for 18k a year. So 11-15 local comp followed by that if you want Oxbridge and your child is very intelligent. Or Peter Symonds, which also allows boarding. There is also a grammar school in Kent called Cranbrook which is a bit like a private school. You just pay for the boarding. If you are not anti boarding, that is.