The 297 items on the Leon UK menu range from 0 kcal for the English Breakfast Tea up to 1354 kcal for the GFC Crispy Chicken Nuggets Bucket (15 Pieces). The highest free sugar is the Hot Chocolate (Oat Milk, Large) at 38.0g, which is 127% of an adult's daily limit of 30g.
Boone separates free sugars from the sugars that occur naturally in milk and whole fruit, which NHS daily limits do not count, and measures every figure against the guideline for a specific age and sex rather than an adult average. Set the size and the milk in the calculator to see how any combination changes.