"The second fundamentally important point is the need to link the facts relied upon by the local authority with its case on threshold, the need to demonstrate why, as the local authority asserts, facts A + B + C justify the conclusion that the child has suffered, or is at risk of suffering, significant harm of types X, Y or Z. Sometimes the linkage will be obvious, as where the facts proved establish physical harm. But the linkage may be very much less obvious where the allegation is only that the child is at risk of suffering emotional harm or, as in the present case, at risk of suffering neglect. In the present case, as we shall see, an important element of the local authority's case was that the father "lacks honesty with professionals", "minimises matters of importance" and "is immature and lacks insight of issues of importance"