A mother-of-two has praised a Diss business for raising awareness of a rare condition, which affects one in 10,000 people in the UK. Becca Brunton’s four-year-old son, Zac, has phenylketonuria (PKU), which means his body cannot break down an amino acid called phenylalanine. Without treatment, the acid could build up in his blood and cause irreversible brain damage. Ms Brunton, of Constable Close, described her delight when she noticed that Diss Funeralcare, in Stanley Road, had put up a window display focusing on the condition as part of PKU National Awareness Month. “My friend saw it while I …