Rich Christmas Cake

• 450 grams sultanas
• 450 grams seedless raisins
• 450 grams butter
• 450 grams brown sugar
• 450 grams flour
• 230 grams currants
• 230 grams mixed peel
• 230 grams glace pineapple
• 230 grams glace apricots
• 230 grams prunes