I'm in the UK and was in a situation through no fault of my own where i faced being made homeless. I'd advise your friend to make contact with the Homelessness prevention team at her local council housing place. It may have a different name but if she goes in and asks they'll know where to direct her. She will need to take ID and any eviction notice from her current residence. If she can get a letter from her doctor/psychiatrist stating her mental health issues and how this situation is effecting her this will help her case too.