Oh yawn. My DC did cofe leafy state primary first. Like many of their classmates they ended up at independents. Variety of reasons:
V bright and latin, three sep sciences and broad mfl were important and not available in the local comps.
Struggling a bit so smaller classes in the less competitive indies helpful.
Didn't get their choices of state or indy so boarded at a prep for another shot at 13.
Parents didn't have good cofe secondar string to their bow because hadn't kept up church attendance.
Almost all families who couldn't stretch to fees did keep up church attendance.
Common denominator about those who went private - they could afford it for some, somehow.
Everyone knew the reasons for people's choices. People were quite open about it. Everyone knew who the cleverest dc were, which ones were dyslexic, whose daddy or mummy had been made a big 4 partner.
We could afford it. DH went to a comp and Oxford and wanted his dc to have the self assurance and confidence he didn't if they arrived there. They both did. What I find v interesting is that their contemporaries who were as bright or brighter who went to even the better secondaries or the grammar (uber competitive) did not. That imo makes every penny worth it if you can.
Qualify that statement by saying we were in the SW London bubble.