Coldplay frontman Chris Martin has confirmed that his band are back in the studio working with Rihanna on their first collaboration since their 2011 single Princess of China.

Speaking on US radio station Fresh 102.7, Martin said: "I love being in the studio with Rihanna. It wasn't necessarily with . . . I was working for her. I don't think she even asked, I just said, 'Please can I try something?'"

Asked if she will be on the next Coldplay album, Martin replied: "I hope so, yeah. I have a really nice song which . . . maybe, I hope so."

He also revealed that the band are already working on the follow-up to their No. 1 album Ghost Stories. "We knew we wanted to make this thing called Ghost Stories, and then make something else. Worst answer of all time . . . but we have an idea, then we're gonna go on tour after that.".