Snickers Peanut Butter Cheesecake

Name: Snickers Peanut Butter Cheesecake
Ingredients: 50 g (2oz) butter, melted, plus extra to grease; 175 g (6oz) dark chocolate digestive biscuits; 2 x 42 g Snickers, chopped into large pieces; 500 g (1lb 2oz) full-fat cream cheese (we used Philadelphia), at room temperature; 75 g (3oz) icing sugar; 75 g (3oz) smooth peanut butter; 1 tsp. vanilla extract; 100 g (3 ½oz) white chocolate, broken into pieces; 300 mL (10 fl oz (½ pint)) double cream; 4 x 42 g Snickers, cut into 1cm (1/2in) slices; 50 g (2oz) dark chocolate, broken into pieces; Caramel dessert sauce, to drizzle; Small handful roasted salted peanuts, roughly chopped