It's business time - today is Le Mans Saturday. Our weekend started at Brands Hatch early on Friday, and the next morning sees us join spectator traffic into Circuit de la Sarthe, woven into the southern edge of Le Mans city. Of course, many are already here - a large proportion of the quarter-of-a-million fans expected to attend are dug-in at camping areas dotted about the complex's vast perimeter. We park up on a strip of grass pinched between Arnage Airport and the circuit's home straight - private jets and helicopters will ferry the slick set in and out all day at some expense, but a race ticket for the whole weekend costs from just £25.