Place the mixed dried fruit, prunes, almonds, and 1/2 cup of rum in a bowl. Let soak overnight or for at least 24 hours to allow the flavors to meld.
Preheat your oven to 325°F (163°C). Grease and line a 9-inch round cake pan or a similar-sized pan with parchment paper.
In a bowl, sift together the flour, baking powder, cinnamon, nutmeg, cloves, allspice, and salt. Set aside.
In a large bowl, cream together the softened butter and brown sugar until light and fluffy.
Beat in the eggs, one at a time, mixing well after each addition. Then add the molasses, treacle (or dark corn syrup), orange zest, lemon zest, vanilla extract, and almond extract.
Fold the soaked fruit mixture into the batter, followed by the chopped candied citrus peel and the remaining 1/2 cup of rum.
Gradually fold in the dry ingredients until just combined.
Pour the batter into the prepared cake pan and smooth the top. Decorate with the glacé cherries if desired.
Bake in the preheated oven for 1.5 to 2 hours, or until a toothpick inserted into the center comes out clean.
Allow the cake to cool in the pan for about 10 minutes before transferring to a wire rack to cool completely.
Enjoy your meal!