2U.K.Where a direction given by virtue of paragraph 1 above is in force as regards goods of any class or description and any article contained in them, and goods of that class or description are imported into the United Kingdom containing a quantity of that article such as, in the opinion of the Commissioners, to suggest that advantage is being taken of the direction for the purpose of evading duty on the article, the Commissioners may, notwithstanding the direction, require that on those goods the duty in question shall be calculated as if they consisted wholly of that article or (if the Commissioners see fit) shall be calculated according to the quantity of the article actually contained in the goods.