Quick and easy Apple Crumble recipe with oats

Easy and simple Apple Crumble recipe. A brilliant British dessert, quick and easy, family friendly, kids love it! Ingredients: (enough to serve a family of 4) - 4-5 medium to large apples (any variety), peeled, cored and chopped - 150g butter or margarine - 150g flour - 50g caster sugar - 50g oats - 2 teaspoons ground cinnamon - 1/2 teaspoon ground nutmeg - 50g brown sugar - approx. 120mls water #applecrumble