Ugly Duckling Carrot and Oatmeal Cake topped with Coconut Caramel

Name: Ugly Duckling Carrot and Oatmeal Cake topped with Coconut Caramel
Ingredients: 100 grams rolled oats; 150 milliliters just boiled water; 100 milliliters milk; 75 grams sultanas (golden raisins); 1/2 teaspoon salt; 115 grams very soft butter; 150 grams light brown sugar; 1 teaspoon vanilla; 100 grams shredded carrots (2 medium sized ones); 2 eggs, large; 50 grams sweetened shredded coconut; 180 grams all purpose flour; 1 teaspoon baking powder; 1 teaspoon cinnamon; 1/2 teaspoon nutmeg; 1/2 teaspoon allspice; For the topping; 85 grams butter - very soft; 75 grams light brown sugar; 3 tablespoons milk; 150 grams sweetened shredded coconut; 50 grams coconut flakes; 75 grams walnuts, chopped