In the last few years of their success, Westlife have refused to follow the toe-path of the regulation boyband. “Are we even a boyband anymore? I have absolutely no idea,” says Nicky Byrne, with disarming candour. Tradition has it that after the first five years, absolute maximum, the boyband must by default implode to make way for the new model. With Westlife, there simply hasn’t been a new model to outshine them. On the straight up British pop roster, Westlife have existed since before SClub7, B*Witched, Blue, Girls Aloud, Atomic Kitten, Busted, Misteeq, McFly, Liberty X and all the...