Paul McCartney is remembering a moment he experienced after John Lennon died. "When you go through your grieving," he told me once, "and you just sort of think: 'What if he was here? What might we say?' We might talk about when we met and, being John, he might say: 'Ah, f**k off,' because we were that kind of mates, and I'd say to him, 'No, you f**k off.' It's like when you think of someone who's passed away, you get to see them again." That night, he also talked to me about his late mother, Mary. "She died when I was 14," he says. "She was Irish but she was sort of posh-Liverpool. She grew up in the other capital of Ireland, Liverpool."