Whip double cream with sweet and condensed milk and vanilla essence just until soft peaks form. Don't overbeat, we are not looking for whipped cream here. Fold in creme de cassis.
If using an ice cream machine, pour the vanilla base in and start churning for 10-15 minutes. Gently swirl chopped cherries in and put in the freezer to firm up for 5-7 hours.
If not using an ice cream machine pour in the vanilla base into a freezer safe container and put in the freezer for 1 hour.
Remove from the freezer and swirl in chopped cherries, continue freezing for 5-7 hours.
Before serving sprinkle with the syrup from the preserves.