H ow do you solve a problem like Matty Healy? It’s something Taylor Swift’s loyal legion of fans has been pondering for months. The swaggering, chaotic 1975 frontman (and son of sometimes Loose Woman, Denise Welch) has had Taylor’s ‘Swifties’ all riled up. After her shock split with unassuming, calm, handsome actor Joe Alwyn, Swift leapt head first into the arms of pretentious showman Matt Healy. For some, Healy is the sort of sleazy star the sanitised world of rock has been missing. He smokes and guzzles wine on stage, snogs his fans, sucks their thumbs, kisses security guards, eats...