Dimple Patel didn't arrive at the CEO chair via the usual route. She grew up on a council estate in the north of England, the daughter of immigrants who had their house burnt down and opened the shop the next morning anyway. She got to Cambridge on scholarships, traded through the 2008 financial crisis at Goldman Sachs, scaled a coffee chain to 37 stores and sold it to private equity, pivoted into tech, exited a second company days before the consumer market collapsed — and then walked into t...