Put the sultanas in a small bowl with the orange zest and pour over the ginger wine and rum. Cover and leave to stand for at least 4 hours. Mix together the orange juice and Dark Molasses Sugar, stirring until the sugar has dissolved. Strain the liquor from the sultanas intot he orange and sugar mixture. Add the cream and spices and beat until thick - be careful not to overbeat. Gently fold in the sultanas and almonds and spoon into serving dishes. Sprinkle with the crystallized ginger. Chill before serving.
Source : Carol Wilson's "Porters English Cookery Bible"