In a saucepan, combine the water, sugar, mixed spice, cinnamon, mixed fruit, sultanas and butter. Bring to a boil and let simmer for one minute. Remove from the heat and stir in the flour, bicarb soda and eggs. Pour into a microwave-safe bowl.
Place the bowl into the microwave, uncovered. Cook for 10 minutes on full power. Let stand for 5 minutes. Serve warm with your favorite custard.