The joy of a sunny blue sky spring day brings people out to enjoy Princes Street Gardens with its splendid carpet of colourful crocus flowers in bloom. Sitting and chatting on the lawn, gently walking along and stopping to admire. Behind an open top tour bus ready for passengers to show them around Edinburgh. The Balmoral clock tower reads just after 2pm – but is it actually a few minutes fast to encourage passengers for Waverley train station to speed up to catch their train?