In a cocktail shaker, muddle blackberries and thyme with a wooden spoon. Add orange juice, lemon juice, honey, and cinnamon and shake well. Pour a glass, and top with soda. Garnish with blackberry in thyme sprig. Serve chilled.
For chef Dhillon, nothing beats the marriage of fresh ingredients and unexpected spices lending an unpretentiously brilliant twist to his take on even the humble classics.