BM, the Spanish supermarket chain, has announced the launch of a new brand called Bertako Baserrietako Esnoki Froskoak (Bertako) under which it will begin to sell high quality artisanal dairy products. All the products in the new Bertako line are described as being made using a traditional method and with the milk of Laxta sheep, a traditional Basque country breed that is an important source of raw materials for the …