Take all crumble ingredients in a bowl, add in butter and rub it with your fingers or fork to resemble it coarse crumbs. Put this in fridge till needed.
Take pear, cherries, sugar, cinnamon and cornflour in a bowl and mix well.
Pour this in a baking pan and spread it evenly.
Now top with crumbles and pop them in oven.
Bake for 40 to 45 mins till the top is bubbly and golden.