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Last week, the singer announced the group would kickstart its 2018 European tour in Berlin waving the EU flag as a call for unity and support of the European Union project and against the Brexit vote. But the Irish songwriter had to interrupt his performance in Berlin on the band's first leg of its European tour as he suddenly lost his voice. He told his fans: “Before we left the dressing room I was obviously ready to sing for you so something has happened. “I'm so sorry. Something has happened and I think we can't go on. It's not right for you. I'm sure this is not a big problem but I'm gonna have to do something.

“If people want to go home, that's fine — we'll play another show for you another time. “Let's break, let's break for 10 minutes.” The millionaire musician and political activist who warned ahead of the Brexit referendum that leaving the EU would be an "existential threat" to Europe, admitted to feeling proud of his European identity and of the work the EU had done to "spread the benefits of prosperity" across member states. Writing for the Frankfurter Allgemeine, Bono said: "U2 is kicking off its tour in Berlin this week, and we’ve just had one of our more provocative ideas: during the show we’re going to wave a big, bright, blue EU flag.

Brexit news: Bono forced to cancel Berlin concert as he loses his voice on stage

If people want to go home, that's fine, we'll play another show for you another time Bono

"Europe is the theatre of powerful, emotional, clashing forces that will shape our future. "As a European, I feel proud thinking back to when Germans welcomed frightened Syrian refugees (I’d feel prouder had more countries stepped up); proud of Europe’s fight to end extreme poverty and climate change. "And, yes, extraordinarily proud of the Good Friday agreement and how other countries have rallied behind Ireland on the border issue, revived by Brexit." One Twitter user wrote: “Natural justice for s******g off Brexit. Bono left voiceless, waving a little EU flag…” Another wrote: “See, say a second referendum comes around, forget every other Brexit slogan or merit, just simply say this: Vote Brexit, Bono loses his voice forever. “I predict an 80 percent landslide.”