Sarah Mayor is the daughter of Roger and Mary Mead, who started Yeo Valley at Holt Farm in 1961 with 30 cows and the odd sheep. Mary opened a tea room and the clotted cream they made for it meant there was lots of skimmed milk left over. So they tried making yoghurt ... and people seemed to like it. They still do - and the Mead family is still living and working at Holt Farm today.