Sarah Corbett Lynch: ‘The truth is I did lie, and that is a big part of why the Martens are walking free. I know Molly told me to lie but I will always have guilt’

Few 18-year-olds enjoy, or even need, the therapeutic escape of the ocean quite like Sarah Corbett Lynch. For the teenager now based in Kilkee, Co Clare, joining the local diving club has provided some welcome calm.