You know those pictures that circulate online of baking disasters? One went viral just recently, showing a horse cake that someone had made to mark the Queen’s funeral. Those pictures always make me sort of laugh-gasp-sob. I think perhaps grip us in the same way that true crime grips us; namely, with that vertiginous sense of ‘oh my goodness, that could so easily be me’. We all know what it is to have so perfectly conceived of an idea, a flawless, shining star in our imagination. The perfect cake, the perfect holiday, the perfect relationship, the perfect presentation, the perfect business strategy. And we all know what it feels like,…