So what does Paul think of his newfound stardom? "It's bonkers," he says. Throughout his life, Paul has struggled to build the confidence to match his powerful voice. "Well, I've just always sung. It was something I used to do when I was very young. I used to use it as a way of escaping the bullies at school because they couldn't wait the hour I was in the school choir."
Paul credits his wife, Julie, with his success. "I applied for the show basically on a flip of the coin in the end because I couldn't decide whether I had the talent or whether I was too old. And I think that the person that's really given me the most confidence in my life the last four years has been my wife, who has been an incredible support."
Paul and Julie talk about love, challenges and the best advice Simon Cowell gave them after the show.
Although Paul's YouTube clip was viewed 25 million times in a single summer and his first album, One Chance, has sold a million copies, he is still in disbelief. "I've been shown the clip with the YouTube background on quite a few shows, and it's weird watching and hearing yourself and think, 'Is that really me?'"