Preheat the oven to 160C/320F/Gas Mark 3 (reduce the temperature by 10C or eqiuvalent if a fan assisted oven).

Mix the flour, bran, spices and soda together in a bowl. Put the milk and orange juice in another container and lightly beat in the eggs. Put the margarine, sugar and treacle/molasses in a saucepan on a low heat and stir until the sugar has dissolved. Remove from the heat and stir in the dry ingredients and then add the eggs/milk/juice mixture.

Pour the mixture into a 2lb loaf tin lined with baking parchment and bake for around 40 minutes. Alternatively, if you want to make iced gingerbread squares, put the mixture in a 9" (23cm) square, lined tin and bake for 35 minutes. When it's cold, use 8oz (250g or one and a quarter cups) icing sugar (frosting) and enough water to make a thick, spreadable icing.