Fruit crumbles are actually a very recent British dessert; people started making them during the Second World World because rationing meant that ingredients like butter and flour were either too sparse or too expensive to make enough pastry for a pie. Instead, people compromised, omitting the pastry base, and just sprinkling some pastry dough over the top of the fruit.
Crumbles are now a classic, and the the type of ingredients you can make your crumble from varies from traditional pastry dough to chopped nuts. Apple crumble is the most common, but here I've also added some delicious figs. Based on the brands I've uses, each slice is about 262 calories.