Grantanow
Unfortunately I think nothing will be done about this once the media circus has moved on to the next problem. Substandard housing is a real problem in the UK and it won't be solved overnight. There may be culpability in this case but it's not obvious what the solution was in the absence of alternative accommodation or technical solutions. Better social housing is the answer but Councils have not been building much if it over the years since the sale of Council houses started by the Tories. So-called affordable homes are out of reach of many tenants.
I fear you are right.
This will cost a great deal of money, and sadly I can’t see the government, particularly this one, prioritising this awful problem. Houses and flats need to be properly constructed, but retrospective remedial treatment, ie ventilation and insulation and adequate heating will cost millions. This is a symptom of our grossly unequal society, where the poor have no power and can be ignored.


