Marianne Lake

÷ JP Morgan finance chief who is tipped to succeed the boss, Jamie Dimon ÷ Brought up in England by British and American parents, and studied at University of Reading ÷ Single mother-of-three who had less than three months off work after having twins ÷ On having children without a partner, she says: ‘I never worried about raising a kid on my own. I’m not 20 with my eyes closed. The circumstances aren’t traditional, but I didn’t hesitate to do it.’ ÷ She once dreamed of being a film star ÷ Has joked that she likes banking dinners where you can ‘drink through the speeches’ – in contrast to many strait-laced Wall Street bosses