Carbonated Water, Colour (E150d), Sweeteners (Aspartame, Acesulfame K), Flavourings (including Caffeine), Acids (Phosphoric Acid, Citric Acid), Preservative (Potassium Sorbate). Contains a source of Phenylalanine. 

• Energy: 3 kJ / 0.6 kcal
• Fat: 0g
• Saturates: 0g
• Carbohydrates: 0g
• Sugars: 0g
• Protein: 0g
• Salt Equivalent: 0g

• Suitable for vegetarians and vegans
• No added sugar
• Contains artificial sweeteners
• Contains caffeine and natural flavourings
• Contains preservatives
• Not classified as HFSS (High Fat Salt Sugar)

The product does not contain:

• Gluten
• Milk
• Eggs
• Nuts
• Soy
• Sesame
• Fish
• Crustaceans
• Mustard
• Sulphites (>10ppm)

It also states there is no cross-contamination risk for these allergens.