You need to push yourself, put yourself in uncomfortable situations rather than stick to your comfort zone.

Sex is more openly spoken about than 40, 50 years ago, and I think probably in comparison to a lot of bands - certainly other contemporary pop girl bands - we're certainly not as suggestive. We talk about sex in the way that we would to our friends. As a girl group, I think it was important not to avoid those sort of things either, because it's about confronting people's idea of what women should be talking about and how they should talk about it. There's no point in shying away from subjects like that, because they exist.

Music is enough of an expression that it doesn't really matter what the words are or what language it's in.

Because it's my first language, all the literature that I've read and all the things that I've been inspired by that have been written in Welsh have moved me beyond anything that I've experienced in any other language.

What playing solo has reminded me is how much I love electronic music and how much I love dance music. I'd like to move towards something more hypnotic and rhythmic rather than song-based.

Each language gives you something different so that's a good enough reason for you to learn it.

I instinctively want to create pop songs and I think it's really good to challenge that, otherwise it becomes a habit.