§ Mr. SHINWELLasked the President of the Board of Trade what is the percentage reduction in the costs of production estimated from the de-rating proposals in the industries affected?
§ Mr. H. WILLIAMSFor most trades I have no sufficient information to calculate the precise percentages, due largely to the fact that the calculation of the cumulative effect in the case of a finished product involves tracing the course of the materials through all the processes through which they pass before they reach the factory or works in which the final processes are carried out. The aggregate benefits to certain groups of undertakings were given by me in answer to a question by the hon. Member for Rochdale (Mr. Kelly) on 14th May, a copy of which I am sending the hon. Member.