Put the raisins and ale in a small saucepan and bring just to the boil. Pour into a large bowl and leave to stand until cold.
Stir the sugar, caraway seeds, if using, and egg into the beer mixture. Add the flours and baking powder and stir in.
Spoon the mixture into a greased and lined 1 kg (2 lb) or 1.3 litre (2¼ pint) loaf tin (see