@ArchMum345 this is true when they're small but it quickly out strips childcare costs, plus you have to add in the increased shelling out for longer holidays and the associated care that goes with that.
We have several family friends who proceeded on this basis and who have found the snowballing costs very difficult. Plus they are in a "boiling the frog" situation with 2 families getting swept up in taking a step up to the more premier senior school options too.
For those of us with DC of at least equal academic drive and ability, who have taken the state options and whose children are doing at least as well, if not more happy due to shorter days, less pressure and the option to have a wider variety of experiences as no weekend school and excessive sport/study commitments and more free cash. It all looks a bit bonkers.
Clearly less of a dilemma if this is easy money for you and doesn't really impact. But for those I know who have sleepless nights, extra work and grandparents' financial input just to keep plates spinning, it really looks a bit mad. And the sliding doors moment was not just starting state primary in the first place.
Coming from a family that made these sacrifices for private school, not one of my siblings would argue it was worth it and not one of us has any intention to do the same for our dc. And we all went to different greater London school including ones that are popular enough to have whole threads on here.