Step 1In a food processor or blender, whizz 100g raspberries, 100g blackberries, 2tbsp runny honey and 1tbsp Greek-style yogurt until smooth. Transfer 1/2 the berry mixture to a medium bowl and mix in 375g Greek-style yogurt.
Step 2Roughly chop 50g raspberries. Spoon 1/2 the yogurt mixture into 6 x 100ml lolly moulds, tapping the moulds on a work surface to level and remove air bubbles. Spoon in 1/2 the remaining berry mixture, followed by 1/2 the fresh raspberries. Top with the remaining yogurt mixture. Spoon in the remaining berry mixture and fresh raspberries and swirl gently with a skewer or cocktail stick.
Step 3Insert lolly sticks and freeze for at least 8hr (ideally overnight), until solid. Remove from moulds and serve.