During WWII rationing in Great Britain, only two types of margarine were available: a premium brand and a cheaper budget brand. With the end of rationing in 1955, the market was opened to the forces of supply and demand, and brand marketing became prevalent. The competition between the major producers was given further impetus with the beginning of commercial television advertising in 1955 and, throughout the 1950s and 1960s, competing companies vied with each other to produce the margarine that tasted most like butter.