For the cheesecake, place the crushed chocolate biscuits into a bowl. Add a third of the butter and all the honey to the crushed biscuits and mix everything together well with a wooden spoon.
Preheat the oven to 180C/350F/Gas 4. For the crumble topping, tip the flour, sugar and cinnamon into a bowl. Rub in the butter with your fingertips until the mixture resembles breadcrumbs.