Thom Yorke has threatened to "sue the living shit" out of David Cameron if the prime minister uses a Radiohead song in a future election campaign.

"I can't say I love the idea of a banker liking our music, or David Cameron," the singer told Dazed & Confused. "I can't believe he'd like [2011's] King of Limbs much. But I also equally think, who cares? … As long as he doesn't use it for his election campaigns, I don't care. I'd sue the living shit out of him if he did."

Keane found themselves in that position in 2010, when their song Everybody's Changing was played at a Conservative party launch. "Am horrified," wrote drummer Richard Hughes. "I will not vote for them."

While Yorke holds strong opinions on social and environmental issues, DJing for Occupy London and attending the UN's climate change conference in 2009, he admitted that "politics is not a fun thing to write about". These days the Radiohead frontman tries to calm himself down – and perk up his spirits – with yoga and meditation. "I'm not as volatile as I used to be, which is good, 'cos I'd have burned out if I was," he said. "I can still be a nightmare, though."

The 44-year-old is also a workaholic. "When we got back from tour, I gave myself a week off from the studio and that was it," he said. "I was cheating anyway, because I was actually working on my laptop on the quiet." Over the past year, that has mostly meant working with his side project Atoms for Peace, whose debut album is out on 25 February.

"It's not like [2006 solo album] The Eraser at all," he said. "But it's not a band album either; it doesn't sound like a band playing … We wanted to go into the song realm, because it felt good to do that. [But] if it were up to me, every track would be 10 minutes long … To me, the Atoms album is not dancey enough."

Despite this, Yorke said he could never imagine making an instrumental album. "I've got all these nice little boxes for my studio, and I kind of half know how to use most of them," he said. "Really, I just enjoy writing words sitting at a piano. I tend to lose interest in the drum machine."