You have to keep challenging yourself. I've always tried to do that, and I'm not saying I've always been successful. Maybe I've rewritten the same song; it's inevitable, but I've always been mindful of taking the writing somewhere else. You can't stick in your little comfort zone.
People say you make your best work when in despair, but I think happiness is a good place to write from.
I could write songs about politics, but I'm conscious of not writing songs that sound the same as the ones I wrote 30 years ago.
"Ageism" or whatever you want to call it, is a very English phenomenon. You don't get it too much in many other cultures. And no one says it about authors or poets or filmmakers. "Oh, they're too old to make films or write books." You know what I mean?
When I lived in a little flat in Pimlico in 1981, I'd write in the hallway. As you walked in, there was a tiny little recess type thing, hardly a hallway, really, and I'd sit there writing songs with my guitar.
I'm very, very open to experimenting with different people and trying to find different methods of writing and making music.