Here is a clip that mentions it; if I can find a paper to reference i'll edit this comment when I get home:
https://podverse.fm/clips/BJE2hv7gZ
Edit: The connection was made specifically with violent crimes. Here is an article about it that has links to some research papers:
https://www.theatlantic.com/business/archive/2014/10/does-in...
On the ground, at the moment, housing is monopolised by those with decent careers or established wealth.
From scratch?
Someone a few years into a career in a well paid field may be able to afford a flat or house quite far out. A bog standard middle class worker may be able to afford to rent a small flat.
Someone working in the supermarket full time will be sharing a flat or house; someone worse than that (e.g. children of the above, part-time or unemployed) will likely be more than one to a room unless they managed to acquire social housing when it was still available.
Overcrowded housing leads to high stress levels, arguments, kids spending their time on the street, all sorts of nonsense.
This is a pattern through a lot of London. Central London has a lot of well-paid workers, but even then almost nobody can afford to live there, unless they're happy with tiny flats or sharing. So they commute to nicer homes outside the city center. And the slums - and Tottenham is essentially a slum - see these well-off people travel through their area, and try to take what they can, because they can't see a route out.