Preheat the oven to 180C/350F/Gas 4.
Place the flour and sugar in a large bowl and mix well. Taking a few cubes of butter at a time rub into the flour mixture. Keep rubbing until the mixture resembles breadcrumbs.
Place the fruit in a large bowl and sprinkle over the sugar, flour and cinnamon. Stir well being careful not to break up the fruit.
Butter a 24cm/9in ovenproof dish. Spoon the fruit mixture into the bottom, then sprinkle the crumble mixture on top.
Bake in the oven for 40-45 minutes until the crumble is browned and the fruit mixture bubbling.
Serve with thick cream or custard.