Mr. Brown: When the 35-mile length of the M6 from Carnforth to Thrimby is completed in August next year, the motorway will be fully open to traffic as far north as Penrith, with a further extension as far north as Carlisle due to beopen by December, 1970. Undoubtedly this route will be used by heavy and through traffic in preference to the A66. It istoo early to judge the full extent of the...