Naked wedding cake

2 x 15cm (6 inch) cake

125g butter

125g caster sugar

2 eggs

1 tsp vanilla extract

125g self-raising flour, sifted

1 tbsp milk

2 x 20cm (8 inch) cake

225g butter

125g caster sugar

4 eggs

2 tsp vanilla extract

225g self-raising flour, sifted

2 tbsp milk

2 x 25cm (10 inch) cake

500g butter

500g caster sugar

8 eggs

1 tbsp vanilla extract

500g self-raising flour, sifted

4 tbsp milk

Filling

2 x 454g jars of strawberry jam

600ml double cream, whipped

250g raspberries

250g blueberries

250g strawberries

Roses, optional

Icing sugar, for dusting