There has to have been some kind of cultural shift within Social Services, judging from some of the commentary in that article.
Despite reservations from Doctors who had examined the child, despite his own testimony and that of his sibling, Social Services, it would seem, chose to ignore this evidence in favour of the mothers story that the child was clumsy and "ran into things".
And, referring back to other, previous high profile cases discussed here, Social Services in other cases, like Baby P and the Climbie case, appear to have ignored the evidence of multiple bruises or injuries as evidence of abuse in favour of believing the lies from the mother of boisterous or clumsy behaviour by the child.
One cannot help but think that Social Services are so wedded to the idea that it is better to "keep a family" together that nothing short of a dead body will convince them otherwise...