Preheat the oven to 190C/375F/gas mark 5
Use a deep 20cm/8 inch square cake tin.
Grease and line the cake tin. Sift together the flour and baking powder. Work the oil into the sifted mixture until it resembles fine breadcrumbs. Stir in the spice, sugar, fruit and orange peel. Dissolve the bicarb. in the soya milk, add the lemon juice and orange rind then mix quickly into the dry ingredients. Turn into the tin and make a slight hollow in the centre. Bake in the oven for about 1 hour 35 minutes or until risen and firm to the touch. Turn out and cool on a wire rack.
Icing. Mix the icing sugar and the orange juice together and drizzle over the cake. Sprinkle with the orange peel.