Ahead of his new standup show, the Catastrophe star discusses working through the pain, defending the NHS and becoming a better dad Rob Delaney is on a canoe, sailing down the North American waterways with a massive lump of cheese in his mouth. Not literally; that would be a weird place to do an interview. But in his head he's there now, reminiscing about a pivotal point in his life. "It was 25 years ago. And the fri…