Blue cheese of blue veins. The distinctive flavor and aroma of blue cheese arises from methyl ketones (including 2-pentanone, 2-heptanone, and 2-nonanone) which are a metabolic product of "Penicillium roqueforti". These compounds are not formed in other types of cheese fermented by bacterial acidification alone. In the European Union, many blue cheeses, such as Cabrales, Danablu, Gorgonzola, Roquefort and Blue Stilton, carry a protected designation of origin, meaning they can bear the name only if they have been made in a particular region. Similarly, individual countries have protections of their own such as France's Appellation d'Origine Contrôlée and Italy's Denominazione di Origine
Lymeswold cheese was branded Westminster Blue, because some non-English speakers had difficulty pronouncing the name Lymeswold. In 1979 the Milk Marketing Board began discussions with the large dairy firm Unigate that led in 1981 to the restructuring of its processing and marketing activities under the Dairy Crest brand to use surplus milk production for making other dairy products. The initiatives that followed included the launch in 1982 of Lymeswold cheese. The name was derived from public competition to name the new cheese. It was at first produced at Cannington creamery in Somerset. The cheese's creation was hailed by Peter Walker, then Agriculture