Add the wine, water, sugar, cinnamon, cloves and orange to a large saucepan and heat but don’t allow it to boil. Reduce the heat and simmer for 10 minutes, stirring occasionally.
Strain it over a bowl to remove all the ‘bits’. Allow to cool.
Add ice and frozen raspberries and cranberries to a tall glass, then fill halfway with the cooled mulled wine. Top up with Sprite and add a sprig of rosemary.