Is not directly to do with the advert, but around 1970 Cadbury;'s still produced a special cocoa drink, then mainly for the navy. It was made from ground cocoa nibs and flour, the flour giving a thicker more energy giving product, though possibly it did not taste as good (I never tasted any, but it was supposed to be a very good drink for naval personnel out at sea in the cold wind). This was the way drinking chocolate had originally been made in the 1800s, the flour absorbing the fat. so that it did not rise to the surface in any unpleasant film. This was replaced in the commercial product, and a big hting made of the new product being pure and unadulterated, and by 1970 the flour-containing product was actually illegal to sell under the food regulations. however, as the stuff for the navy was for the ministry of defence, these rules did not apply.