Combine 40% Bran Flakes and boiling water in bowl. Let stand 10 minutes. Sift together flour, baking soda and salt; set aside. Cream together shortening and sugar in large mixing bowl until light and fluffy, using electric mixer at medium speed. Add eggs, one at a time, beating well after each addition. Stir in Bran Flakes mixture and all-bran into creamed mixture. Add dry ingredients alternately with butter/sour milk to creamed mixture, mixing just enough to moisten. Spoon batter into well-greased 4 cm muffin-pan cups, filling 0.66666666666667rds full. Bake in 200ºC . oven 25 minutes or until golden brown. Serve hot with butter and jam. NOTE: Batter can be stored for a few days in the refrigerator. Bake as directed.