It includes the Perth suburbs of Mundaring , Mount Helena , Chidlow and Yanchep and the Wheatbelt towns of Gingin , Northam , York , Brookton , Pingelly and Narrogin .
It includes the towns of Gingin , Mundaring , Mount Helena , Chidlow , Northam , York , Yanchep , Brookton , Pingelly and Narrogin .