there is of course ghettoisation without the Son's and Daughters policy, but that's akin to saying there was anti semitism prior to the Holocaust (to sail as close to Godwins law as I can
).
The Son's and Daughter's policy would further exasperate the problem whilst at the same time naturalise such "ghettoisation" into "sustained communities".
If the Son's and Daughters policy had been kept in effect many of Britains most diverse working class areas would never have come into existance.
Working class communities have always been the most diverse and dynamic, from the days when Kropotkin and Rocker were knocking around the East End, involved in the Yiddish workers movement, it is this instability and constant breaking down of cultures and synthesis that gives the working class such explosive potential to break with all forms of conservatism.
The argument must always be one of "housing for all" with no qualifications at all! That way immigrants are able to become part of the community, to bring something to it.
You still haven't explained how the Son's and Daughters policy would avoid marginalising immigrant populations, afterall if they aren;t the sons and daugthers of a local they are in essence second class citizens. Also why son's and daughters, does that mean that a single 25 year old with English parents has more right to a house than a the daughter of an immigrant or an immigrant with two kids?
Also if I moved to an area would I be excluded from housing too?
You are living in a fucking dream world. A sustained community is not some great thing in itself. Infact it's provincial and in can be extremely reactionary, just ask the millions of people who come to London to escape such a dull existance. In Northern Ireland there are sustained communities and they are the fucking bastions of bigotry, and the summer immigration ruptures them open the better.