If the grandparents throw her out she will be an emergency case and the council HAVE BY LAW to home her within 48 hours.
But the grandparents MUST write a letter saying that they are not prepared to have the baby in the house and they are making her & baby homeless.
Unless the council get the letter saying she is going to be made homeless she will wait years on the housing list as she is 'adequately housed' .
It sounds hard but I had to do this for my son and daughter in law , I wrote a letter saying I could not house them and was about to throw them out on the street. Within an hour they were put in a 'Bed and breakfast' hostel and got a 3 bed council house 6 weeks later.
I know a lot of ABers will object to this but social housing is now ONLY available to emergency cases, others will wait 10 years or more.
The council even payed for a Taxi to take them to the B&B What ever she does do not let her rent privately, again as soon as she has a private rental available she is no longer an emergency case and goes back to the bottom of the queue as she will be ''adequately housed''
I know this sounds drastic but it is the ONLY way to get instant council/housing accociation accomadation.
I was told to do this by my youngest son who is a senior housing / finance manager with a very large London council , he really does know how to get things done. He even wrote the letter for me !