"My very MC white British DCs go to a very non-MC very mixed primary school."
And so do mine. (well, my kids aren't white, but whatever). Their school is 80% non-white and there are many disadvantaged children there.
However, there are also the children of university lecturers, teachers, lawyers, bankers at this school.
The problem is when you get to the year 4, and then in our area what happens is this.
Anyone who has money pays out shed loads for 11+ tutoring for the last two years of primary in hope of getting their children into the local grammars.
Or they remortgage the house and send them private for the last two years to improve their chance of getting into a selective school at the age of 11.
Or they up sticks and move to the south of the borough which is more expensive and where the intake for schools is much more m/c.
Or they apply for church schools. There are two or three fantastic church schools in the south of the borough and many children from my dc's schools go to these. As many of the (mostly African and West Indian) parents at the school are devout members of evangelical churches this is a viable option for them.
And those (like mine) who don't have the option of doing this go to the local comprehensive, whose intake is massively, disproportionately deprived, and where the social environment is incredibly tough and scary. There is a massive problem with gangs in my area and the school has not been immune from the problems these bring.
These schools are very, very hard places to learn and to teach. The children keep their heads down and try not to attract attention to themselves. My dd was sexually harrassed (verbally) in the most disgusting way within weeks of starting in year 7.
As a naturally articulate and reasonably bright middle class kid she was allowed to get away with MURDER academically and did no work through the whole of year 8. Because she was in class with her hand up and was able to talk her way out of trouble. But her written work was non-existent and nobody seemed particularly bothered by it. As long as she was there and joining in.......