A couple of years ago, I bought this lovely little folder to put all the recipes that I wanted to keep from magazines etc. I was handed a recipe for a Toblerone Cake in W.H. Smith of all places. I have never made it but I thought it looked interesting:
60z Digestive Biscuits
3oz Butter or margarine
10fl oz Double Cream
Flake or White Chocolate
Melt butter in pan. Pour over crumbled biscuits. Mix and use to line an 8" tin. Refrigerate for 1 hour. Melt the Toblerone. Whisk the cream (not stiff). When the chocolate has started to cool, fold in cream. Pour the mixture over the base. Return cake to fridge for 1 hour. Decorate with flake or white chocolate.