10U.K.In the case of any document such as is mentioned in paragraph 7 above, if at any time during the journey or on unloading at the place of delivery the quantity of the ballast to which the document relates is found to be less than that stated in the document, the statement shall nevertheless be deemed for the purposes of this Act to be correct if, but only if, it is proved that the deficency is solely attributable to the draining away of normal moisture from, or tie consolidation of, the ballast during the journey.