Very interesting replies, but what a mix-up!
“However the same number plate also appears on a number of other cars in the book so it is clear that Daimler used to swap it from car to car.
•One of the prototypes had the larger grille and although the book says the car retains this grille to this day no-one (as far as I am aware) knows where it is.”
So, although you have 100002 and XHP 438, I assume that the prototype with the larger grille was probably earlier?
What a pity you haven’t got that one!
