438 Ford D800 Tipper Truck (1970-1977)

Hi all. I recently won the lot below from Vectis. My primary reason for bidding was the dark green Mercedes truck. But upon closer inspection it could he there is another promo in this lot? The Yellow Tipper in the centre of the lot looks from above to be a Cross Tipper for Rent promo, as the decal / label placement are similar if not the same as a model sold at Vectis in 2004. Which I might add is the only reference I could find for this promo. It will take a couple of weeks for the lots I've won to arrive and I will post further pictures then, in the meantime is any one familiar with this promo model and can provide further info or images? Cheers Dave