Certain songs have a life, and certain songs don't. A song is like a saddle: you ride it for a while, and if it's the right kind of song you can sing it for the rest of your life. And then other songs are only really important for certain periods of your life, and you move on from them and find yourself not necessarily needing to sing them anymore.

I grew up wearing black arm-bands when the hunger strikers died. I went on those marches. I grew up basically a Provo, though I never obviously got into any activities. I was writing 'IRA, Brits out' on walls all over where I grew up, but that was a false sense of Irishness.

In Irish law, busking is considered vagrancy - you can be arrested for it. It's risky asking people for money in public. So it's not like it's a high-art job. And people who do it as a high-art job make very little money.

I think it's very interesting, people who can't stand people who whinge and whine. It seems almost like a class issue. Because you think about who is the most positive, who's the most redemptive songwriter that's ever existed in your lifetime?

I think ultimately, people are selfish in that department [blues], in a good way - the reason we're attracted to art is because it somehow reflects us. And I think, ultimately, we're a tribal people by nature. We're not individualistic. We almost like to hear that there's other people in a worse state than us. Sometimes even more than we like hearing there are people in better states than us.

My dad was quiet, angry, shut down. So my thing is: I express everything that's there. I want to get it all out.

I pick up my guitar and play. Something might come, and then the pen comes out. Then an edit, until something comes out that you're actually satisfied with.