Good overview of the many ways in which data can be bad and in turn, lead to bad consequences. The focus is very heavily on UK, with a few comparisons to how a couple of other countries might be handling their data; that being said, the methodological issues described are very probably a challenge worldwide. Because the examples given are very disparate and the issues quite systemic, readers may find it tricky to come away with any deeper conclusions or concrete actions aside from being curious and questioning of fast news, overconfident pollsters and politicians wanting to seem decisive.