Hawaiian shirts are among those classic garms that tend to divide opinion in a serious way. On one side, there are haters who claim they’re garish and tacky – ‘Look at Ace Ventura or Magnum PI!’ they might shout. On the other side are the more sartorially daring, who reclaim them as kitschy-cool, colourful and down for fun, claiming ‘Like Ace Ventura, or Magnum PI!’.