Preheat oven to 325 degees F. Grease and line a deep 8" round cake tin.
Combine the fruit, chopped nuts, and marmalade in a bowl. Sprinkle in about a TBSP of the flour (this is to help it not sink to the bottom of the cake while baking.) Set aside.
Cream the butter and sugar together in a bowl until pale and fluffy, then beat in lemon rind.
Add the eggs to the creamed mixture, one at a time. (Note: The mixture has always curdled on me at this point. Don't panic - it bakes up fine.)
Sift the remaining flour over the mixture and fold in lightly with a spatula, then fold in the fruit and nut mixture.
Turn the mixture into the prepared cake tin, and make a slight hollow in the center with the back of a metal spoon. Arrange the almonds on top in a fun and decorative pattern.
Bake in preheated oven at 325 for a half hour, drop temperature to 300 and bake 1 more hour. Cake should feel very firm, and a skewer inserted in the center should come out clean. Leave in the tin for 15 minutes, then turn out onto a wire rack to cool.
Either eat immediately with tea, or to mature the cake: Once cake is completely cool, wrap in parchment or plastic wrap, then wrap in aluminum foil. Leave it somewhere cool & dark. Let mature at least a week.