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.

Our base for watching the action is Club Dunlop, fronted by a small, elevated stand that lets us track cars all the way up the start/finish straight, uphill through the Dunlop Curve in front of us, then through the chicane and under the Dunlop bridge. Celebrations are in order here, for while 2013 brings the 90th anniversary of Le Mans 24, it also marks 125 years since John Boyd Dunlop patented the pneumatic tyre. Hats off to you, John. He'd have been glad to know his wares are worn by 18 of the 22 entries in LMP2, the largest class in action today.

The atmosphere mounts through the morning's support races, but a personal highlight is the 'Legends of Le Mans' parade, lead by the Bentley Speed Six that won here in 1929 and 1930. The lineup also includes the 621bhp Porsche 917K and the gorgeously petite Ferrari 166 MM Barchetta.