The reason for the popularity of religiously selective schools (unlike religious school that are open to all, generally) is that it is a form of selection that can be gamed. Same as with geographical selection (good schools in small catchments like Honeywell and Belleville, which are not religious schools). Parents who value education are more likely to do what it takes to get their child in.petal wrote: I think there are probably enough school to accommodate religious and non religious school.
And if you are not of a certain religion, why would you want to attend that school anyway?
And in answer to your first question, Wandsworth suffers from an overrepresentation of religiously selective schools, more so than any other borough in London. When I lived in Battersea and was considering primary schools, of the sixteen in my vicinity, nine selected on the grounds of religion!!!