Rishi Sunak may have rendered them uncool this week, but the trainer has risen to ubiquity in the past few years. So what is it about this fairly simple design that is so widely loved?On the train from Peckham in south London to Dalston in east London the other day, it became hard to ignore: everywhere I looked were Adidas Sambas. White ones. Black ones. Those Wales Bonner ones with the pony fur and leopard print. Little silver ones. Black leather ones with studs.The humble Adidas Samba, once... Read this story