On March 18 this year, Louise Phelan tried something for the first time: She went on holidays by herself. “That lasted three days,” she said. “I’m one of 17 [children] so you’re never on your own. After day two, I thought, ‘I’m actually going to end up in a mental home. I need to go back and find someone to go on holidays with’.” Louise Phelan is busy and likes it.  The last time The Currency caught up with the businesswoman in 2021, she had left PayPal but was still on the board of Ryanair and had recently become CEO…