§ Mr. Adleyasked the Secretary of State for Trade and Industry whether he will give comparative measurement figures of smoke emission of, respectively, the VC10, the Boeing 727, the Boeing 707–320B, the DC8–50, and the production Concorde.
§ Mr. NobleThere has been no generally accepted method of making these comparisons but a system agreed with the United States authorities is about to be published. This will enable engine emissions to be measured and compared on a standard basis.