Raisin and banana loaf

I'll never remember how I made this as I kind of made it up as I went along, so for my future reference: 

1 loaf

• 115g butter
• 115g dark sugar
• 4 bananas (3 mashed, 1 chopped)
• 150g raisins
• 230g Self Raising Flour
• 2 eggs
• 1/2 teaspoon bicarbonate of soda
• 1 teaspoon cinammon

Chuck everything in a bowl, blend together, put in a greased loaf tin and bake at 180°C for 55 mins.

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