Bonnie Tyler was experiencing “severe pain” in the days before the emergency surgery that has led to her being placed in a medically induced coma . The Welsh pop star, famed for her Eighties smash “Total Eclipse of the Heart” , was undergoing surgery in her current base of Portugal, with her spokesperson confirming in a statement that doctors had put her into an induced coma to “aid her recovery”. Now, Tyler’s friend Liberto Mealha, a businessman based in the Algarve, has described the weeks leading up to Tyler’s current condition, with the 74-year-old singer first complaining of feeling unwell while playing a gig in London in March. Bonnie Tyler was undergoing surgery and doctors had to put her into an induced coma to ‘aid her recovery’ (Getty) “She started feeling unwell during a concert in London and went to a doctor for tests, but they didn’t detect anything there,” Mealha told The Sun .…