Mix all fruit in a large Saucepan.
Add water to cover fruit. Bring water to boil. Simmer for 5 minutes. Preheat oven to 130 degrees
Grease and line roasting tin with grease proof paper. Roasting tin roughly 28cm Square.
Add eggs to caster sugar. Combine thoroughly.
Strain water from fruit. Return fruit to saucepan.
Cut butter into blocks and add to fruit in saucepan. Allow butter to melt.
When butter has melted, add combined egg and sugar mixture. Stir to mix.
Add sifted flour and stir thoroughly.
Pour mixture into prepared tin. Ensure evenly distributed throughout.
Generously sprinkle Demerara Sugar over mixture. Place in the oven for approx 2hrs