When is an underdog no longer an underdog? Is it when he’s the act who begins the Olympics Opening Ceremony? Maybe it’s when he has headlined both Wembley Arena and O2 Arena, two of the UK capital’s biggest venues? Or perhaps it’s when each of his records is bigger and more successful than the last? Or maybe it’s simpler than that: maybe an underdog is no longer an underdog when he connects in the way that Frank Turner connects, writing songs that inspire their crowd to reflect, to singalong, to holler along, to hold their arms aloft, all at once.