At Hallam it was a case study... the rest of my reply is based on the Children and Families route...
You started out with a small amount of information and would need to explain what you would do based on that information. The case study would progress until you were looking at removing a child from their parents, placing them in foster care, etc.
Many people fall into the trap of reading the information and jumping straight down the Section 47 route.
Read through the whole case study first so you can see how it is going to progress.