With all due respect, Mr Schofield, what depressing defeatist codswallop!
There are reams of good evidence around on the success of mixed communities and I'd suggest the Joseph Rowntree Foundation's work (http://www.jrf.org.uk/publications/mixed-communities-success-and-sustainability) just as a starting point. You'll find there are a number of factors covered that are untouched in the article.
So why the selective reading given by Mr Schofield above? What makes a manager at a large provider suggest the UK should follow the literally glowing example of the Paris banlieus? And could it be linked to vanishing subsidy and the increasing Govt pressure to sweat HAs?
Once mixity is abandoned the next step is anybody's guess. However, I wouldn't bet against large London providers buying up land in Stoke just yet.