For the fruit fillingPlumsApplesSugarButterFor the crumble toppingSelf raising flourCold unsalted butterLight brown sugarGround cinnamon and nutmegDemerara sugar for a little crunch!
Place all the crumble ingredients in a bowl. Use your fingers to rub the butter into the flour and sugar until you have a crumbly sandy texture that forms clumps when pinched together.
Cover the fruit with the crumble topping and sprinkle with Demerara sugar. Bake for 45-50 minutes, or until the filling is bubbling through the crumble and the topping is crunchy and golden.