The deficit at conference was not even the most embarrassing thing that the Labour leader has forgotten. After it was revealed in 2010 that Ed was not on his son’s birth certificate, Labour claimed that “pressures of attending the Copenhagen climate change summit as the then energy secretary, as well as the forthcoming general election campaign” had “distracted him from completing the form after Daniel’s birth.” Perhaps if he’d had four weeks off, he might have got round to a trip to the Town Hall…