Just caught end of local news, they had a feature about overcrowding in London council housing. They showed a council flat, not quite sure how big it was, but it was occupied by three generations of an Asian Muslim family (a couple were wearing jilbabs), 8 in all, but apparently they count as 6 1/2 people for overcrowding because children under 1 don't count (not sure where the 1/2 comes from).
Anyway my wife's response was 'if they don't like it, they should go back where they came from' (DW is an immigrant, and shared a bed with her sister growing up - they had 7 people in two bedrooms, some would sleep on mats on the floor), given that much worse/more cramped conditions are I'm sure completely normal where they came from. If DW's parents had they wanted a bigger house they'd have to pay for it, though they'd tend to spend the money expanding their business rather than home improvements.
They had an exterior shot of the flat, which is very prime real estate, central London, worth hundreds of thousands of pounds to buy, or several thousand per month on the open market.
Apparently Boris has promised to half overcrowding in 20 years, but it seems odd to me, obviously a family of 8 is fairly normal in Afghanistan/wherever (in large part because they don't see personal space as so important and so you can fit a lot of people in to a small place) but it really doesn't fit into central London, especially not when the taxpayer is footing the bill.