You have a signature guitar out with Farida. What's the story behind that?
"They approached us about doing it. I think they'd done it with a few other people previously, and were interested in us. We faced a bit of a dilemma whether to make an acoustic or electric guitar, particularly because over the past couple of albums we've moved away from making acoustic music anyway.
"But at the same time, Jack and I both felt that we could make a better acoustic guitar than an electric one. We wanted to do it justice, and wanted to have something that we would want to play as opposed to something that maybe had our names on it, or was endorsed by us. You wouldn't wasn't to endorse something that you would't want to play."
So you had input into the design and feel of the guitar?
"Yeah, quite a lot. Obviously I couldn't make it myself, but I knew what I wanted and what I didn't like about a lot of acoustics. So that was the starting point.
"They made two, one for Jack and one for me. They're the same size and shape, but made from different wood. I think mine is a mahogany and rosewood, and his is a… maple, maybe? I can't remember what his is. But they're great sounding guitars.
"Jack decided to take all the fret dots off his, and unless you're quite a good player it's virtually impossible to play because you can't tell where you are on the guitar! So I think that was aimed at teaching people to become better players, but I've seen him make quite a few mistakes on it as a result [laughs]."