Months of early-morning dance rehearsals all come down to this. Immune to 80,000 noisy ticket holders outside, all we hear are instructions from Gina, our Manc director and segment chartist, on our in-ear radios. It's 9.57pm on Friday 27th July 2012, and we're about to be watched by an expected more than a billion people for the Opening Ceremony of the London 2012 Olympic Games.