The 1975: lack of self-belief has never been an issue for a band built in the larking image of Matty Healy. Photographed earlier on their tour by Burak Cingi/Redferns for ABA/Getty THE 1975 3Arena, Dublin ????? In the hours ahead of The 1975’s Dublin concert, at 3Arena, speculation swirls about potential guest performers. Might Bono put in an appearance? Niall Horan? Daniel O’Donnell? The possibilities are endless – the group have already welcomed Taylor Swift, Lewis Capaldi and Charli XCX for surprise cameos on this tour. Alas, Swift has stayed at home to watch Dancing with the Stars, so Dublin...