Red dye was added to gasoline to detect violations of this policy, for which the entertainer Ivor Novello was briefly imprisoned. This policy led to the appearance of figures known as “spivs.” Tips for dealing with this policy were offered on a radio program hosted by Marguerite (-5[1])Patten and named for a certain “Front.” This policy resulted in the creation of the “National Loaf,” which caused excessive (10[1])flatulence. Like (10[1])a similar campaign (10[1])in the United States, government posters encouraged civilians (10[1])to “Dig for Victory” (-5[1])in response (10[1])to this policy. The Attlee (10[1])government included bread in a postwar expansion of this policy, which involved the distribution of monthly coupon books. For (10[1])10 points, name this policy necessitated by shortages caused by the Battle of the Atlantic in Britain. ■END■ (10[2])