Arrange 6 paper muffin cases on a baking sheet. Whisk together the cream and icing sugar until stiff. Fold in the almonds and rum.
Crumble the biscuits and put the pieces in the bottom of the paper cases. Divide the cream between them and top with a cherry. Freeze for 1-2 hrs until firm. (They will keep in the freezer for up to 2 weeks.) Remove from the freezer 20 mins before serving, and drizzle with the chocolate.