Happy international Swing Day, and no I am not talking about seats on ropes that you find in the playground and how that one person would always say that they once swung on it all the way around. No, I am talking about the often hidden heroes that are swings in the theatre industry, those talented performers ready to jump on stage in a different role at a moments notice and how we would be completely lost without them. Whilst the word Understudy (or Thunderstudy if you are lo