Butter and line a 20cm springform cake tin and arrange the quince slices in the base. Heat the honey, butter and sugar together until it is completely melted then bring to a boil. Turn off the heat and cool to warm, then beat in the eggs and fold in the flour and allspice. Spoon the cake mix over the quince slices and bake for 1 hour, or until a skewer comes out clean (bear in mind the quince will be sticky, so check for cake mixture only). Cool for 5 minutes, then loosen the side of the tin and turn the cake onto a serving plate and lift off the base. Carefully peel off the paper. Brush over some of the quince juices and serve the rest with the cake if you like.