I don’t think anybody would ever possibly suggest that this was a remotely acceptable situation but, like some others have advised on here already, there is nothing at this stage to support that this was the ‘fault’ of the local authority and/ or health services.
Pregnant women are automatically deemed in ‘priority need’ for local authority housing assistance under s.189(1)(a) of the Housing Act 1996 (Part 7) and this means that they are entitled to emergency accommodation if homeless. If they meet other criteria beyond this following investigation by the LA housing team, they will then be owed the ‘main housing duty’ which means they will remain accommodated pending a final offer of housing (which often takes years of course).
In the event that a pregnant woman does not meet all criteria to be owed the main housing duty, the housing team will refer her to their Children’s Services department, who are legally bound to accommodate her irrespective of the reasons for her circumstances. This includes in cases where a woman is not ‘eligible’ for housing assurance, because she has no legal right to reside in the UK.
I have worked in housing for a long time now and I have never once seen a local authority ‘gatekeep’ and refuse assistance to a pregnant woman so as to make her rough sleep.
This does not mean that this isn’t what has happened here, but I suggest it’s more likely that this woman was either entirely unknown to services altogether, or did not engage after being offered assistance (such as refusing an offer of temporary accommodation).
If so, this does not mean we should blame or judge her (only an incredibly vulnerable person would do this) but it certainly shouldn’t be assumed that the blame lays neatly elsewhere.
I do very much hope that whatever happened to lead to this desperately sad situation, that she and her children are now receiving the support they require.