There's nothing quite like the thrill of the Paris motor show. Even as the show opens, there's already an atmosphere of anticipation across the hall: the dazzling lights, the hoards of car lovers and, of course, the cars.

But the biggest excitement of all, is when no one has yet seen the car. There's more of these at the Paris show this year than at any motor show that I can remember and it's going to be a riveting day.