The likelihood is that nan will have got a special guardianship order which means Children's Services involvement will end and it will be up to nan how much contact she has and how its facilitated. Childrens services could of got a supervision order alongside this so they can continue working with the family for a year to support nan with this but depends how the court feels nan is able to manage Sallies tome with the kids.
I highly doubt that given the risk. It may of progressed to an SGO years down the line. But there is no way those children wasn’t on full care orders. I’ll burn my degree if I’m wrong.