HC Deb 08 July 1976 vol 914 c666W
Mrs. Winifred Ewing

asked the Secretary of State for the Environment what savings in lives, or in transport costs, or other advantages are expected to result from changing road speed limits and distance signs to metric units.

Dr. Gilbert

At this time, none. There would, however, be practical disadvantages in indefinitely retaining the mile after such time as the yard and the foot would have gone out of use.