Put the pomegranate juice, half the rosemary, bay, cloves, cinnamon, sugar, and orange zest in a pan, and bring to a gentle simmer over a low heat. Once steaming, remove from the heat, put on the lid and leave to infuse for at least 2 hrs, or up to 24 hrs chilled.

When ready to serve, strain the pomegranate juice into a punch bowl with a handful of ice cubes. Add the non-alcoholic gin, vinegar and pomegranate seeds, and remaining rosemary sprigs. Top up with soda water in the glasses just before serving.