Wash the cucumbers and cut into fine slices. Sprinkle with 2 teaspoons of salt and cover with water and leave to cool overnight. Rinse thoroughly under cold running water and dab dry. Wash the dill, pluck roughly and pat dry. Arrange cucumber slices, dill and bay leaves in 4 carefully cleaned glasses. Bring vinegar, white wine and 3/4 litres of water with sugar, remaining salt, juniper berries and mustard seeds to the boil, stir in preserving aid and pour over the cucumbers. Let glasses cool down, then close them