Preheat the oven to 160C/325F/gas mark 3
Use a 20cm/8 inch cake tin.
Grease and line the cake tin. Sift the flour and baking powder and rub in the butter until the mixture resembles fine bread crumbs. Add the sugar. Scatter the peel and raisins over the surface. Mix the marmalade into the milk, warming to dissolve. Allow to cool. Mix the soda into the milk mixture, and use it to mix the dry ingredients to a soft dough. Place in the cake tin and bake for one hour. Lower the heat to 150C/300F/gas mark 2, and bake for a further forty five minutes or until the cake is springy and browned. Cool well before cutting.
