It's early Friday morning on the Le Mans weekend, and I'm on the start line, about to take Audi's finest for a spin. That the start line belongs to Brands Hatch rather than Circuit de la Sarthe and the Audi in question is an R8 rather and the R18 LMP1 racer is hardly a disappointment - I'm about to fire up and head under the sea towards my first experience of the 24 Heures du Mans.