Are you really implying a school in Croydon, a large town in south London is going to be functionally and qualitatively equivalent to say a school in Golders Green, an area in the London Borough of Barnet? [1][2]
Equivalent in all the areas one might measure the attractiveness and potential of a school?
You've linked to the wrong wikipedia article, and used the word "town", which leads me to think you don't understand London much.
Is there any reason you linked to wikipedia articles about a part of London with a large Jewish population vs a part of London with a large ethnic minority population?
I know nothing about schooling in England, but I would imagine the parents’ education as well as socioeconomic status plays a much greater role than elementary schooling, as is the case everywhere else.
Equivalent in all the areas one might measure the attractiveness and potential of a school?
[1]
https://en.wikipedia.org/wiki/Croydon
[2]
https://en.wikipedia.org/wiki/Golders_Green
edit:typo