There are some sweeping statements on here
e.g. 'all forms of selection disadvantage working class kids'
simply not true in every case husbands parents were as working class as they come miners kids from Scotland, no one in the family had been to University EVER both got into grammar school and their lives were totally different as a result.
South London faith schools selecting in the way you describe, is simply not true in every case, I thought it was widely recognised that some do exactly the opposite they are full of lower socioeconomic group immigrant kids whose parents have aspirations or expectations for them, my former local community schools however were full of the offspring of Eurobankers renting houses that cost way over 1,000000.
the trouble is people feel very passionately about this subject and that tends to be reflected in their statements
what really needs to be found is a way not to manipulate the system, I offer you Shirley Williams whose daughter went to Godolphin and Latymer after she moved into the area at just the right time, Blair and the lib dem guy with kids at the Oratory, Cameron whose daughter was/is at a primary school (State Faith) which teaches Latin, Diane Abbott whose son was sent to the City of London school (private)
I am sure they didn't feel that selection by bank balance disadvantaged their childen (although I accept they don't really represent the working class)
so how can you avoid selection ban private schools and make all admissions a lottery with widespread bussing?