Mix the jelly powder with 1/2 litre of boiling water until the powder has dissolved. Pour liquid into four tall dessert glasses. Place glasses at an angle in the refrigerator and allow to set for about 2 hours.
Mix the sauce powder and 3 tablespoons of milk. Bring the remaining milk and sugar to the boil. Remove from the heat, stir in sauce powder and bring to the boil again briefly. Let cool while stirring. Strip currants from the panicles, wash and drain.
Stir into the sauce and pour over the jelly.