5 tbsps light brown soft sugar, plus extra to taste
1 orange, quartered and sliced
1 lime sliced, plus extra juice to taste
750ml red wine
Put ½ the blackberries in a blender with the orange juice and wizz until smooth. Strain through a sieve into a pan, pressing out as much liquid as possible; discard the pulp. Add the rosemary and sugar to the pan and bring to the boil. Remove from the heat and set aside to infuse until the mixture is cool, then discard the rosemary sprigs.
When ready to serve, put the slices of orange and lime in a large jug with the remaining blackberries. Pour in the red wine, brandy and blackberry and orange mixture. Top up with plenty of ice, stir to combine and taste to see if it needs more sugar or a squeeze of lime juice. Server straight away.