The NAO found that Government data sets are not consistently joined-up, which makes it difficult to understand the nature and scale of the adverse impacts faced by adolescents, particularly where these are overlapping adverse outcomes. This makes it harder to understand how risks escalate and how support can be better targeted.64 The Department for Education agreed there are clusters of overlapping needs, but it said these clusters are complicated and it did not consider that there was a single big overlap in adverse outcomes. It told us there is value in interrogating and understanding the particular overlapping sets of need to identify patterns where different approaches would make sense.65